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Finding the Fourth Proportional to 48.92, 73.28 and 28.57

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Solution

The fourth proportional to 48.92, 73.28 and 28.57 is: 42.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.92 : 73.28 = 28.57 : x
  2. Step 2: Convert to fraction form
    48.92/73.28 = 28.57/x
  3. Step 3: Cross multiply
    48.92x = 73.28 × 28.57
  4. Step 4: Simplify right side
    48.92x = 2,093.61
  5. Step 5: Solve for x
    x = 2,093.61/48.92
  6. Step 6: Final answer
    x = 42.80

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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.