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Finding the Fourth Proportional to 58.57, 80.67 and 48.85

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Solution

The fourth proportional to 58.57, 80.67 and 48.85 is: 67.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.57 : 80.67 = 48.85 : x
  2. Step 2: Convert to fraction form
    58.57/80.67 = 48.85/x
  3. Step 3: Cross multiply
    58.57x = 80.67 × 48.85
  4. Step 4: Simplify right side
    58.57x = 3,940.73
  5. Step 5: Solve for x
    x = 3,940.73/58.57
  6. Step 6: Final answer
    x = 67.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.