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Finding the Fourth Proportional to 56.38, 84.57 and 40.18

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Solution

The fourth proportional to 56.38, 84.57 and 40.18 is: 60.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.38 : 84.57 = 40.18 : x
  2. Step 2: Convert to fraction form
    56.38/84.57 = 40.18/x
  3. Step 3: Cross multiply
    56.38x = 84.57 × 40.18
  4. Step 4: Simplify right side
    56.38x = 3,398.02
  5. Step 5: Solve for x
    x = 3,398.02/56.38
  6. Step 6: Final answer
    x = 60.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.