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Finding the Fourth Proportional to 680,172,946.22, 938,608,470.14 and 378,773,803.56

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Solution

The fourth proportional to 680,172,946.22, 938,608,470.14 and 378,773,803.56 is: 522,691,033.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,172,946.22 : 938,608,470.14 = 378,773,803.56 : x
  2. Step 2: Convert to fraction form
    680,172,946.22/938,608,470.14 = 378,773,803.56/x
  3. Step 3: Cross multiply
    680,172,946.22x = 938,608,470.14 × 378,773,803.56
  4. Step 4: Simplify right side
    680,172,946.22x = 355,520,300,288,560,512
  5. Step 5: Solve for x
    x = 355,520,300,288,560,512/680,172,946.22
  6. Step 6: Final answer
    x = 522,691,033.60

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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.