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Finding the Fourth Proportional to 49.92, 74.49 and 46.31

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Solution

The fourth proportional to 49.92, 74.49 and 46.31 is: 69.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.92 : 74.49 = 46.31 : x
  2. Step 2: Convert to fraction form
    49.92/74.49 = 46.31/x
  3. Step 3: Cross multiply
    49.92x = 74.49 × 46.31
  4. Step 4: Simplify right side
    49.92x = 3,449.09
  5. Step 5: Solve for x
    x = 3,449.09/49.92
  6. Step 6: Final answer
    x = 69.10

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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.