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Finding the Fourth Proportional to 40.75, 56.17 and 37.48

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Solution

The fourth proportional to 40.75, 56.17 and 37.48 is: 51.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.75 : 56.17 = 37.48 : x
  2. Step 2: Convert to fraction form
    40.75/56.17 = 37.48/x
  3. Step 3: Cross multiply
    40.75x = 56.17 × 37.48
  4. Step 4: Simplify right side
    40.75x = 2,105.25
  5. Step 5: Solve for x
    x = 2,105.25/40.75
  6. Step 6: Final answer
    x = 51.66

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Find fourth proportional to 20.38, 28.09 and 18.74
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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.