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Finding the Fourth Proportional to 58.47, 87.20 and 49.97

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Solution

The fourth proportional to 58.47, 87.20 and 49.97 is: 74.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.47 : 87.20 = 49.97 : x
  2. Step 2: Convert to fraction form
    58.47/87.20 = 49.97/x
  3. Step 3: Cross multiply
    58.47x = 87.20 × 49.97
  4. Step 4: Simplify right side
    58.47x = 4,357.40
  5. Step 5: Solve for x
    x = 4,357.40/58.47
  6. Step 6: Final answer
    x = 74.52

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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.