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Finding the Fourth Proportional to 60.56, 83.53 and 39.80

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Solution

The fourth proportional to 60.56, 83.53 and 39.80 is: 54.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.56 : 83.53 = 39.80 : x
  2. Step 2: Convert to fraction form
    60.56/83.53 = 39.80/x
  3. Step 3: Cross multiply
    60.56x = 83.53 × 39.80
  4. Step 4: Simplify right side
    60.56x = 3,324.49
  5. Step 5: Solve for x
    x = 3,324.49/60.56
  6. Step 6: Final answer
    x = 54.90

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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.