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Finding the Fourth Proportional to 53.47, 73.81 and 38.95

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Solution

The fourth proportional to 53.47, 73.81 and 38.95 is: 53.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.47 : 73.81 = 38.95 : x
  2. Step 2: Convert to fraction form
    53.47/73.81 = 38.95/x
  3. Step 3: Cross multiply
    53.47x = 73.81 × 38.95
  4. Step 4: Simplify right side
    53.47x = 2,874.53
  5. Step 5: Solve for x
    x = 2,874.53/53.47
  6. Step 6: Final answer
    x = 53.76

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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.