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Finding the Fourth Proportional to 40.06, 55.28 and 29.15

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Solution

The fourth proportional to 40.06, 55.28 and 29.15 is: 40.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.06 : 55.28 = 29.15 : x
  2. Step 2: Convert to fraction form
    40.06/55.28 = 29.15/x
  3. Step 3: Cross multiply
    40.06x = 55.28 × 29.15
  4. Step 4: Simplify right side
    40.06x = 1,611.21
  5. Step 5: Solve for x
    x = 1,611.21/40.06
  6. Step 6: Final answer
    x = 40.22

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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.