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Finding the Fourth Proportional to 398,737,672.80, 598,106,509.20 and 234,807,151.20

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Solution

The fourth proportional to 398,737,672.80, 598,106,509.20 and 234,807,151.20 is: 352,210,726.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,737,672.80 : 598,106,509.20 = 234,807,151.20 : x
  2. Step 2: Convert to fraction form
    398,737,672.80/598,106,509.20 = 234,807,151.20/x
  3. Step 3: Cross multiply
    398,737,672.80x = 598,106,509.20 × 234,807,151.20
  4. Step 4: Simplify right side
    398,737,672.80x = 140,439,685,539,428,592
  5. Step 5: Solve for x
    x = 140,439,685,539,428,592/398,737,672.80
  6. Step 6: Final answer
    x = 352,210,726.80

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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.