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Finding the Fourth Proportional to 392.68, 542.89 and 375.46

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Solution

The fourth proportional to 392.68, 542.89 and 375.46 is: 519.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.68 : 542.89 = 375.46 : x
  2. Step 2: Convert to fraction form
    392.68/542.89 = 375.46/x
  3. Step 3: Cross multiply
    392.68x = 542.89 × 375.46
  4. Step 4: Simplify right side
    392.68x = 203,833.48
  5. Step 5: Solve for x
    x = 203,833.48/392.68
  6. Step 6: Final answer
    x = 519.08

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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.