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Finding the Fourth Proportional to 57.92, 80.00 and 51.04

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Solution

The fourth proportional to 57.92, 80.00 and 51.04 is: 70.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.92 : 80.00 = 51.04 : x
  2. Step 2: Convert to fraction form
    57.92/80.00 = 51.04/x
  3. Step 3: Cross multiply
    57.92x = 80.00 × 51.04
  4. Step 4: Simplify right side
    57.92x = 4,082.93
  5. Step 5: Solve for x
    x = 4,082.93/57.92
  6. Step 6: Final answer
    x = 70.49

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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.