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Finding the Fourth Proportional to 392,232.30, 587,831.46 and 155,445.78

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Solution

The fourth proportional to 392,232.30, 587,831.46 and 155,445.78 is: 232,963.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,232.30 : 587,831.46 = 155,445.78 : x
  2. Step 2: Convert to fraction form
    392,232.30/587,831.46 = 155,445.78/x
  3. Step 3: Cross multiply
    392,232.30x = 587,831.46 × 155,445.78
  4. Step 4: Simplify right side
    392,232.30x = 91,375,919,808.24
  5. Step 5: Solve for x
    x = 91,375,919,808.24/392,232.30
  6. Step 6: Final answer
    x = 232,963.78

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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.