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Finding the Fourth Proportional to 49.30, 74.04 and 38.50

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Solution

The fourth proportional to 49.30, 74.04 and 38.50 is: 57.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.30 : 74.04 = 38.50 : x
  2. Step 2: Convert to fraction form
    49.30/74.04 = 38.50/x
  3. Step 3: Cross multiply
    49.30x = 74.04 × 38.50
  4. Step 4: Simplify right side
    49.30x = 2,850.21
  5. Step 5: Solve for x
    x = 2,850.21/49.30
  6. Step 6: Final answer
    x = 57.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.