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Finding the Fourth Proportional to 40.28, 55.49 and 32.51

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Solution

The fourth proportional to 40.28, 55.49 and 32.51 is: 44.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.28 : 55.49 = 32.51 : x
  2. Step 2: Convert to fraction form
    40.28/55.49 = 32.51/x
  3. Step 3: Cross multiply
    40.28x = 55.49 × 32.51
  4. Step 4: Simplify right side
    40.28x = 1,803.54
  5. Step 5: Solve for x
    x = 1,803.54/40.28
  6. Step 6: Final answer
    x = 44.78

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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.