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Finding the Fourth Proportional to 542.95, 749.28 and 306.85

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Solution

The fourth proportional to 542.95, 749.28 and 306.85 is: 423.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.95 : 749.28 = 306.85 : x
  2. Step 2: Convert to fraction form
    542.95/749.28 = 306.85/x
  3. Step 3: Cross multiply
    542.95x = 749.28 × 306.85
  4. Step 4: Simplify right side
    542.95x = 229,916.57
  5. Step 5: Solve for x
    x = 229,916.57/542.95
  6. Step 6: Final answer
    x = 423.46

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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.