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Finding the Fourth Proportional to 45.65, 63.14 and 39.17

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Solution

The fourth proportional to 45.65, 63.14 and 39.17 is: 54.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.65 : 63.14 = 39.17 : x
  2. Step 2: Convert to fraction form
    45.65/63.14 = 39.17/x
  3. Step 3: Cross multiply
    45.65x = 63.14 × 39.17
  4. Step 4: Simplify right side
    45.65x = 2,472.68
  5. Step 5: Solve for x
    x = 2,472.68/45.65
  6. Step 6: Final answer
    x = 54.17

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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.