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Finding the Fourth Proportional to 45.92, 63.40 and 38.16

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Solution

The fourth proportional to 45.92, 63.40 and 38.16 is: 52.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.92 : 63.40 = 38.16 : x
  2. Step 2: Convert to fraction form
    45.92/63.40 = 38.16/x
  3. Step 3: Cross multiply
    45.92x = 63.40 × 38.16
  4. Step 4: Simplify right side
    45.92x = 2,419.34
  5. Step 5: Solve for x
    x = 2,419.34/45.92
  6. Step 6: Final answer
    x = 52.69

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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.