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Finding the Fourth Proportional to 32.57, 48.79 and 25.78

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Solution

The fourth proportional to 32.57, 48.79 and 25.78 is: 38.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.57 : 48.79 = 25.78 : x
  2. Step 2: Convert to fraction form
    32.57/48.79 = 25.78/x
  3. Step 3: Cross multiply
    32.57x = 48.79 × 25.78
  4. Step 4: Simplify right side
    32.57x = 1,257.81
  5. Step 5: Solve for x
    x = 1,257.81/32.57
  6. Step 6: Final answer
    x = 38.62

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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.