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Finding the Fourth Proportional to 49.57, 68.28 and 38.63

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Solution

The fourth proportional to 49.57, 68.28 and 38.63 is: 53.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.57 : 68.28 = 38.63 : x
  2. Step 2: Convert to fraction form
    49.57/68.28 = 38.63/x
  3. Step 3: Cross multiply
    49.57x = 68.28 × 38.63
  4. Step 4: Simplify right side
    49.57x = 2,637.66
  5. Step 5: Solve for x
    x = 2,637.66/49.57
  6. Step 6: Final answer
    x = 53.21

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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.