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Finding the Fourth Proportional to 57.46, 79.31 and 48.23

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Solution

The fourth proportional to 57.46, 79.31 and 48.23 is: 66.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.46 : 79.31 = 48.23 : x
  2. Step 2: Convert to fraction form
    57.46/79.31 = 48.23/x
  3. Step 3: Cross multiply
    57.46x = 79.31 × 48.23
  4. Step 4: Simplify right side
    57.46x = 3,824.48
  5. Step 5: Solve for x
    x = 3,824.48/57.46
  6. Step 6: Final answer
    x = 66.56

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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.