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Finding the Fourth Proportional to 392,910.76, 542,282.08 and 231,805.42

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Solution

The fourth proportional to 392,910.76, 542,282.08 and 231,805.42 is: 319,929.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,910.76 : 542,282.08 = 231,805.42 : x
  2. Step 2: Convert to fraction form
    392,910.76/542,282.08 = 231,805.42/x
  3. Step 3: Cross multiply
    392,910.76x = 542,282.08 × 231,805.42
  4. Step 4: Simplify right side
    392,910.76x = 125,703,925,312.87
  5. Step 5: Solve for x
    x = 125,703,925,312.87/392,910.76
  6. Step 6: Final answer
    x = 319,929.96

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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.