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Finding the Fourth Proportional to 3,478.30, 5,217.46 and 881.24

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Solution

The fourth proportional to 3,478.30, 5,217.46 and 881.24 is: 1,321.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.30 : 5,217.46 = 881.24 : x
  2. Step 2: Convert to fraction form
    3,478.30/5,217.46 = 881.24/x
  3. Step 3: Cross multiply
    3,478.30x = 5,217.46 × 881.24
  4. Step 4: Simplify right side
    3,478.30x = 4,597,834.45
  5. Step 5: Solve for x
    x = 4,597,834.45/3,478.30
  6. Step 6: Final answer
    x = 1,321.86

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Double scale
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Similar ratio
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1.5x scale

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.