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Finding the Fourth Proportional to 60.40, 83.08 and 57.52

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Solution

The fourth proportional to 60.40, 83.08 and 57.52 is: 79.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.40 : 83.08 = 57.52 : x
  2. Step 2: Convert to fraction form
    60.40/83.08 = 57.52/x
  3. Step 3: Cross multiply
    60.40x = 83.08 × 57.52
  4. Step 4: Simplify right side
    60.40x = 4,778.76
  5. Step 5: Solve for x
    x = 4,778.76/60.40
  6. Step 6: Final answer
    x = 79.12

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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.