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Finding the Fourth Proportional to 40.56, 55.97 and 28.32

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Solution

The fourth proportional to 40.56, 55.97 and 28.32 is: 39.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.56 : 55.97 = 28.32 : x
  2. Step 2: Convert to fraction form
    40.56/55.97 = 28.32/x
  3. Step 3: Cross multiply
    40.56x = 55.97 × 28.32
  4. Step 4: Simplify right side
    40.56x = 1,584.93
  5. Step 5: Solve for x
    x = 1,584.93/40.56
  6. Step 6: Final answer
    x = 39.08

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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.