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Finding the Fourth Proportional to 47.40, 71.08 and 44.72

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Solution

The fourth proportional to 47.40, 71.08 and 44.72 is: 67.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.40 : 71.08 = 44.72 : x
  2. Step 2: Convert to fraction form
    47.40/71.08 = 44.72/x
  3. Step 3: Cross multiply
    47.40x = 71.08 × 44.72
  4. Step 4: Simplify right side
    47.40x = 3,178.70
  5. Step 5: Solve for x
    x = 3,178.70/47.40
  6. Step 6: Final answer
    x = 67.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.