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Finding the Fourth Proportional to 44.57, 66.48 and 40.64

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Solution

The fourth proportional to 44.57, 66.48 and 40.64 is: 60.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.57 : 66.48 = 40.64 : x
  2. Step 2: Convert to fraction form
    44.57/66.48 = 40.64/x
  3. Step 3: Cross multiply
    44.57x = 66.48 × 40.64
  4. Step 4: Simplify right side
    44.57x = 2,701.38
  5. Step 5: Solve for x
    x = 2,701.38/44.57
  6. Step 6: Final answer
    x = 60.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.