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Finding the Fourth Proportional to 29.26, 40.40 and 25.15

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Solution

The fourth proportional to 29.26, 40.40 and 25.15 is: 34.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.26 : 40.40 = 25.15 : x
  2. Step 2: Convert to fraction form
    29.26/40.40 = 25.15/x
  3. Step 3: Cross multiply
    29.26x = 40.40 × 25.15
  4. Step 4: Simplify right side
    29.26x = 1,015.73
  5. Step 5: Solve for x
    x = 1,015.73/29.26
  6. Step 6: Final answer
    x = 34.72

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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.