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Finding the Fourth Proportional to 392.13, 542.16 and 374.92

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Solution

The fourth proportional to 392.13, 542.16 and 374.92 is: 518.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.13 : 542.16 = 374.92 : x
  2. Step 2: Convert to fraction form
    392.13/542.16 = 374.92/x
  3. Step 3: Cross multiply
    392.13x = 542.16 × 374.92
  4. Step 4: Simplify right side
    392.13x = 203,262.04
  5. Step 5: Solve for x
    x = 203,262.04/392.13
  6. Step 6: Final answer
    x = 518.35

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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.