Home / 392,938.88-542,321.20-231,833.92

Finding the Fourth Proportional to 392,938.88, 542,321.20 and 231,833.92

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Solution

The fourth proportional to 392,938.88, 542,321.20 and 231,833.92 is: 319,969.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,938.88 : 542,321.20 = 231,833.92 : x
  2. Step 2: Convert to fraction form
    392,938.88/542,321.20 = 231,833.92/x
  3. Step 3: Cross multiply
    392,938.88x = 542,321.20 × 231,833.92
  4. Step 4: Simplify right side
    392,938.88x = 125,728,449,695.10
  5. Step 5: Solve for x
    x = 125,728,449,695.10/392,938.88
  6. Step 6: Final answer
    x = 319,969.48

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1.5x scale

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.