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Finding the Fourth Proportional to 3,478.92, 5,217.90 and 881.70

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Solution

The fourth proportional to 3,478.92, 5,217.90 and 881.70 is: 1,322.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.92 : 5,217.90 = 881.70 : x
  2. Step 2: Convert to fraction form
    3,478.92/5,217.90 = 881.70/x
  3. Step 3: Cross multiply
    3,478.92x = 5,217.90 × 881.70
  4. Step 4: Simplify right side
    3,478.92x = 4,600,622.43
  5. Step 5: Solve for x
    x = 4,600,622.43/3,478.92
  6. Step 6: Final answer
    x = 1,322.43

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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.