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Finding the Fourth Proportional to 49.86, 74.60 and 48.38

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Solution

The fourth proportional to 49.86, 74.60 and 48.38 is: 72.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.86 : 74.60 = 48.38 : x
  2. Step 2: Convert to fraction form
    49.86/74.60 = 48.38/x
  3. Step 3: Cross multiply
    49.86x = 74.60 × 48.38
  4. Step 4: Simplify right side
    49.86x = 3,608.90
  5. Step 5: Solve for x
    x = 3,608.90/49.86
  6. Step 6: Final answer
    x = 72.38

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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.