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Finding the Fourth Proportional to 542.16, 748.08 and 306.09

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Solution

The fourth proportional to 542.16, 748.08 and 306.09 is: 422.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.16 : 748.08 = 306.09 : x
  2. Step 2: Convert to fraction form
    542.16/748.08 = 306.09/x
  3. Step 3: Cross multiply
    542.16x = 748.08 × 306.09
  4. Step 4: Simplify right side
    542.16x = 228,979.81
  5. Step 5: Solve for x
    x = 228,979.81/542.16
  6. Step 6: Final answer
    x = 422.35

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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.