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Finding the Fourth Proportional to 542.15, 748.28 and 342.86

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Solution

The fourth proportional to 542.15, 748.28 and 342.86 is: 473.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.15 : 748.28 = 342.86 : x
  2. Step 2: Convert to fraction form
    542.15/748.28 = 342.86/x
  3. Step 3: Cross multiply
    542.15x = 748.28 × 342.86
  4. Step 4: Simplify right side
    542.15x = 256,551.54
  5. Step 5: Solve for x
    x = 256,551.54/542.15
  6. Step 6: Final answer
    x = 473.21

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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.