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Finding the Fourth Proportional to 625,962,800.40, 938,944,200.60 and 393,168,022.80

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Solution

The fourth proportional to 625,962,800.40, 938,944,200.60 and 393,168,022.80 is: 589,752,034.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,962,800.40 : 938,944,200.60 = 393,168,022.80 : x
  2. Step 2: Convert to fraction form
    625,962,800.40/938,944,200.60 = 393,168,022.80/x
  3. Step 3: Cross multiply
    625,962,800.40x = 938,944,200.60 × 393,168,022.80
  4. Step 4: Simplify right side
    625,962,800.40x = 369,162,834,869,428,608
  5. Step 5: Solve for x
    x = 369,162,834,869,428,608/625,962,800.40
  6. Step 6: Final answer
    x = 589,752,034.20

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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.