Home / 521,520,778,972.20-782,281,168,458.30-518,214,790,799.40

Finding the Fourth Proportional to 521,520,778,972.20, 782,281,168,458.30 and 518,214,790,799.40

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Solution

The fourth proportional to 521,520,778,972.20, 782,281,168,458.30 and 518,214,790,799.40 is: 777,322,186,199.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,520,778,972.20 : 782,281,168,458.30 = 518,214,790,799.40 : x
  2. Step 2: Convert to fraction form
    521,520,778,972.20/782,281,168,458.30 = 518,214,790,799.40/x
  3. Step 3: Cross multiply
    521,520,778,972.20x = 782,281,168,458.30 × 518,214,790,799.40
  4. Step 4: Simplify right side
    521,520,778,972.20x = 405,389,672,058,928,173,678,592
  5. Step 5: Solve for x
    x = 405,389,672,058,928,173,678,592/521,520,778,972.20
  6. Step 6: Final answer
    x = 777,322,186,199.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.