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Finding the Fourth Proportional to 392.52, 542.19 and 319.14

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Solution

The fourth proportional to 392.52, 542.19 and 319.14 is: 440.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.52 : 542.19 = 319.14 : x
  2. Step 2: Convert to fraction form
    392.52/542.19 = 319.14/x
  3. Step 3: Cross multiply
    392.52x = 542.19 × 319.14
  4. Step 4: Simplify right side
    392.52x = 173,034.52
  5. Step 5: Solve for x
    x = 173,034.52/392.52
  6. Step 6: Final answer
    x = 440.83

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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.