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Finding the Fourth Proportional to 392,630.69, 588,913.20 and 155,909.81

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Solution

The fourth proportional to 392,630.69, 588,913.20 and 155,909.81 is: 233,851.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,630.69 : 588,913.20 = 155,909.81 : x
  2. Step 2: Convert to fraction form
    392,630.69/588,913.20 = 155,909.81/x
  3. Step 3: Cross multiply
    392,630.69x = 588,913.20 × 155,909.81
  4. Step 4: Simplify right side
    392,630.69x = 91,817,346,590.78
  5. Step 5: Solve for x
    x = 91,817,346,590.78/392,630.69
  6. Step 6: Final answer
    x = 233,851.68

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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.