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Finding the Fourth Proportional to 43.54, 64.99 and 38.48

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Solution

The fourth proportional to 43.54, 64.99 and 38.48 is: 57.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.54 : 64.99 = 38.48 : x
  2. Step 2: Convert to fraction form
    43.54/64.99 = 38.48/x
  3. Step 3: Cross multiply
    43.54x = 64.99 × 38.48
  4. Step 4: Simplify right side
    43.54x = 2,500.65
  5. Step 5: Solve for x
    x = 2,500.65/43.54
  6. Step 6: Final answer
    x = 57.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.