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Finding the Fourth Proportional to 40.92, 56.16 and 36.74

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Solution

The fourth proportional to 40.92, 56.16 and 36.74 is: 50.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.92 : 56.16 = 36.74 : x
  2. Step 2: Convert to fraction form
    40.92/56.16 = 36.74/x
  3. Step 3: Cross multiply
    40.92x = 56.16 × 36.74
  4. Step 4: Simplify right side
    40.92x = 2,063.04
  5. Step 5: Solve for x
    x = 2,063.04/40.92
  6. Step 6: Final answer
    x = 50.42

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Find fourth proportional to 20.46, 28.08 and 18.37
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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.