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Finding the Fourth Proportional to 542.09, 748.01 and 305.95

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Solution

The fourth proportional to 542.09, 748.01 and 305.95 is: 422.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.09 : 748.01 = 305.95 : x
  2. Step 2: Convert to fraction form
    542.09/748.01 = 305.95/x
  3. Step 3: Cross multiply
    542.09x = 748.01 × 305.95
  4. Step 4: Simplify right side
    542.09x = 228,853.66
  5. Step 5: Solve for x
    x = 228,853.66/542.09
  6. Step 6: Final answer
    x = 422.17

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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.