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Finding the Fourth Proportional to 47.27, 70.54 and 42.92

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Solution

The fourth proportional to 47.27, 70.54 and 42.92 is: 64.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.27 : 70.54 = 42.92 : x
  2. Step 2: Convert to fraction form
    47.27/70.54 = 42.92/x
  3. Step 3: Cross multiply
    47.27x = 70.54 × 42.92
  4. Step 4: Simplify right side
    47.27x = 3,027.38
  5. Step 5: Solve for x
    x = 3,027.38/47.27
  6. Step 6: Final answer
    x = 64.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.