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Finding the Fourth Proportional to 399,168,602.80, 598,752,904.20 and 126,538,932.40

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Solution

The fourth proportional to 399,168,602.80, 598,752,904.20 and 126,538,932.40 is: 189,808,398.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,168,602.80 : 598,752,904.20 = 126,538,932.40 : x
  2. Step 2: Convert to fraction form
    399,168,602.80/598,752,904.20 = 126,538,932.40/x
  3. Step 3: Cross multiply
    399,168,602.80x = 598,752,904.20 × 126,538,932.40
  4. Step 4: Simplify right side
    399,168,602.80x = 75,765,553,268,867,488
  5. Step 5: Solve for x
    x = 75,765,553,268,867,488/399,168,602.80
  6. Step 6: Final answer
    x = 189,808,398.60

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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.