Home / 521,520,778,886.70-782,281,168,330.05-518,214,790,713.90

Finding the Fourth Proportional to 521,520,778,886.70, 782,281,168,330.05 and 518,214,790,713.90

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Solution

The fourth proportional to 521,520,778,886.70, 782,281,168,330.05 and 518,214,790,713.90 is: 777,322,186,070.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,520,778,886.70 : 782,281,168,330.05 = 518,214,790,713.90 : x
  2. Step 2: Convert to fraction form
    521,520,778,886.70/782,281,168,330.05 = 518,214,790,713.90/x
  3. Step 3: Cross multiply
    521,520,778,886.70x = 782,281,168,330.05 × 518,214,790,713.90
  4. Step 4: Simplify right side
    521,520,778,886.70x = 405,389,671,925,582,055,604,224
  5. Step 5: Solve for x
    x = 405,389,671,925,582,055,604,224/521,520,778,886.70
  6. Step 6: Final answer
    x = 777,322,186,070.85

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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.