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Finding the Fourth Proportional to 47.61, 70.92 and 47.52

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Solution

The fourth proportional to 47.61, 70.92 and 47.52 is: 70.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.61 : 70.92 = 47.52 : x
  2. Step 2: Convert to fraction form
    47.61/70.92 = 47.52/x
  3. Step 3: Cross multiply
    47.61x = 70.92 × 47.52
  4. Step 4: Simplify right side
    47.61x = 3,370.12
  5. Step 5: Solve for x
    x = 3,370.12/47.61
  6. Step 6: Final answer
    x = 70.79

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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.