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Finding the Fourth Proportional to 43.72, 65.54 and 25.46

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Solution

The fourth proportional to 43.72, 65.54 and 25.46 is: 38.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.72 : 65.54 = 25.46 : x
  2. Step 2: Convert to fraction form
    43.72/65.54 = 25.46/x
  3. Step 3: Cross multiply
    43.72x = 65.54 × 25.46
  4. Step 4: Simplify right side
    43.72x = 1,668.32
  5. Step 5: Solve for x
    x = 1,668.32/43.72
  6. Step 6: Final answer
    x = 38.16

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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.