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Finding the Fourth Proportional to 658,138.47, 987,207.72 and 159,502.47

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Solution

The fourth proportional to 658,138.47, 987,207.72 and 159,502.47 is: 239,253.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,138.47 : 987,207.72 = 159,502.47 : x
  2. Step 2: Convert to fraction form
    658,138.47/987,207.72 = 159,502.47/x
  3. Step 3: Cross multiply
    658,138.47x = 987,207.72 × 159,502.47
  4. Step 4: Simplify right side
    658,138.47x = 157,462,069,743.07
  5. Step 5: Solve for x
    x = 157,462,069,743.07/658,138.47
  6. Step 6: Final answer
    x = 239,253.71

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Similar ratio
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1.5x scale

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.