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Finding the Fourth Proportional to 57.64, 79.48 and 47.24

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Solution

The fourth proportional to 57.64, 79.48 and 47.24 is: 65.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.64 : 79.48 = 47.24 : x
  2. Step 2: Convert to fraction form
    57.64/79.48 = 47.24/x
  3. Step 3: Cross multiply
    57.64x = 79.48 × 47.24
  4. Step 4: Simplify right side
    57.64x = 3,754.64
  5. Step 5: Solve for x
    x = 3,754.64/57.64
  6. Step 6: Final answer
    x = 65.14

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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.