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Finding the Fourth Proportional to 392,915.88, 542,289.42 and 231,810.84

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Solution

The fourth proportional to 392,915.88, 542,289.42 and 231,810.84 is: 319,937.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,915.88 : 542,289.42 = 231,810.84 : x
  2. Step 2: Convert to fraction form
    392,915.88/542,289.42 = 231,810.84/x
  3. Step 3: Cross multiply
    392,915.88x = 542,289.42 × 231,810.84
  4. Step 4: Simplify right side
    392,915.88x = 125,708,565,973.31
  5. Step 5: Solve for x
    x = 125,708,565,973.31/392,915.88
  6. Step 6: Final answer
    x = 319,937.61

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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.