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Finding the Fourth Proportional to 288,979,404.40, 398,791,838.80 and 156,820,402.20

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Solution

The fourth proportional to 288,979,404.40, 398,791,838.80 and 156,820,402.20 is: 216,412,296.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,979,404.40 : 398,791,838.80 = 156,820,402.20 : x
  2. Step 2: Convert to fraction form
    288,979,404.40/398,791,838.80 = 156,820,402.20/x
  3. Step 3: Cross multiply
    288,979,404.40x = 398,791,838.80 × 156,820,402.20
  4. Step 4: Simplify right side
    288,979,404.40x = 62,538,696,554,693,560
  5. Step 5: Solve for x
    x = 62,538,696,554,693,560/288,979,404.40
  6. Step 6: Final answer
    x = 216,412,296.53

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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.