Home / 521,520,778,890.70-782,281,168,336.05-518,214,790,717.90

Finding the Fourth Proportional to 521,520,778,890.70, 782,281,168,336.05 and 518,214,790,717.90

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Solution

The fourth proportional to 521,520,778,890.70, 782,281,168,336.05 and 518,214,790,717.90 is: 777,322,186,076.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,520,778,890.70 : 782,281,168,336.05 = 518,214,790,717.90 : x
  2. Step 2: Convert to fraction form
    521,520,778,890.70/782,281,168,336.05 = 518,214,790,717.90/x
  3. Step 3: Cross multiply
    521,520,778,890.70x = 782,281,168,336.05 × 518,214,790,717.90
  4. Step 4: Simplify right side
    521,520,778,890.70x = 405,389,671,931,820,495,601,664
  5. Step 5: Solve for x
    x = 405,389,671,931,820,495,601,664/521,520,778,890.70
  6. Step 6: Final answer
    x = 777,322,186,076.85

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Double scale
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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.