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Finding the Fourth Proportional to 40.57, 60.79 and 34.50

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Solution

The fourth proportional to 40.57, 60.79 and 34.50 is: 51.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.57 : 60.79 = 34.50 : x
  2. Step 2: Convert to fraction form
    40.57/60.79 = 34.50/x
  3. Step 3: Cross multiply
    40.57x = 60.79 × 34.50
  4. Step 4: Simplify right side
    40.57x = 2,096.95
  5. Step 5: Solve for x
    x = 2,096.95/40.57
  6. Step 6: Final answer
    x = 51.69

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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.