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Finding the Fourth Proportional to 40.66, 55.91 and 36.49

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Solution

The fourth proportional to 40.66, 55.91 and 36.49 is: 50.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.66 : 55.91 = 36.49 : x
  2. Step 2: Convert to fraction form
    40.66/55.91 = 36.49/x
  3. Step 3: Cross multiply
    40.66x = 55.91 × 36.49
  4. Step 4: Simplify right side
    40.66x = 2,040.16
  5. Step 5: Solve for x
    x = 2,040.16/40.66
  6. Step 6: Final answer
    x = 50.18

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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.