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Finding the Fourth Proportional to 542.12, 748.14 and 306.11

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Solution

The fourth proportional to 542.12, 748.14 and 306.11 is: 422.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.12 : 748.14 = 306.11 : x
  2. Step 2: Convert to fraction form
    542.12/748.14 = 306.11/x
  3. Step 3: Cross multiply
    542.12x = 748.14 × 306.11
  4. Step 4: Simplify right side
    542.12x = 229,015.01
  5. Step 5: Solve for x
    x = 229,015.01/542.12
  6. Step 6: Final answer
    x = 422.45

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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.