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Finding the Fourth Proportional to 542.19, 748.23 and 309.32

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Solution

The fourth proportional to 542.19, 748.23 and 309.32 is: 426.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.19 : 748.23 = 309.32 : x
  2. Step 2: Convert to fraction form
    542.19/748.23 = 309.32/x
  3. Step 3: Cross multiply
    542.19x = 748.23 × 309.32
  4. Step 4: Simplify right side
    542.19x = 231,437.22
  5. Step 5: Solve for x
    x = 231,437.22/542.19
  6. Step 6: Final answer
    x = 426.86

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Double scale
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Similar ratio
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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.