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Finding the Fourth Proportional to 48.43, 73.20 and 47.89

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Solution

The fourth proportional to 48.43, 73.20 and 47.89 is: 72.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.43 : 73.20 = 47.89 : x
  2. Step 2: Convert to fraction form
    48.43/73.20 = 47.89/x
  3. Step 3: Cross multiply
    48.43x = 73.20 × 47.89
  4. Step 4: Simplify right side
    48.43x = 3,505.55
  5. Step 5: Solve for x
    x = 3,505.55/48.43
  6. Step 6: Final answer
    x = 72.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.