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Finding the Fourth Proportional to 680,172,937.35, 938,608,457.90 and 378,773,794.68

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Solution

The fourth proportional to 680,172,937.35, 938,608,457.90 and 378,773,794.68 is: 522,691,021.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,172,937.35 : 938,608,457.90 = 378,773,794.68 : x
  2. Step 2: Convert to fraction form
    680,172,937.35/938,608,457.90 = 378,773,794.68/x
  3. Step 3: Cross multiply
    680,172,937.35x = 938,608,457.90 × 378,773,794.68
  4. Step 4: Simplify right side
    680,172,937.35x = 355,520,287,317,526,016
  5. Step 5: Solve for x
    x = 355,520,287,317,526,016/680,172,937.35
  6. Step 6: Final answer
    x = 522,691,021.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.