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Finding the Fourth Proportional to 49.72, 74.56 and 25.66

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Solution

The fourth proportional to 49.72, 74.56 and 25.66 is: 38.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.72 : 74.56 = 25.66 : x
  2. Step 2: Convert to fraction form
    49.72/74.56 = 25.66/x
  3. Step 3: Cross multiply
    49.72x = 74.56 × 25.66
  4. Step 4: Simplify right side
    49.72x = 1,913.21
  5. Step 5: Solve for x
    x = 1,913.21/49.72
  6. Step 6: Final answer
    x = 38.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.