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Finding the Fourth Proportional to 49.61, 74.14 and 39.47

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Solution

The fourth proportional to 49.61, 74.14 and 39.47 is: 58.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.61 : 74.14 = 39.47 : x
  2. Step 2: Convert to fraction form
    49.61/74.14 = 39.47/x
  3. Step 3: Cross multiply
    49.61x = 74.14 × 39.47
  4. Step 4: Simplify right side
    49.61x = 2,926.39
  5. Step 5: Solve for x
    x = 2,926.39/49.61
  6. Step 6: Final answer
    x = 58.99

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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.