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Finding the Fourth Proportional to 3,944.90, 5,915.10 and 1,479.80

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Solution

The fourth proportional to 3,944.90, 5,915.10 and 1,479.80 is: 2,218.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,944.90 : 5,915.10 = 1,479.80 : x
  2. Step 2: Convert to fraction form
    3,944.90/5,915.10 = 1,479.80/x
  3. Step 3: Cross multiply
    3,944.90x = 5,915.10 × 1,479.80
  4. Step 4: Simplify right side
    3,944.90x = 8,753,164.98
  5. Step 5: Solve for x
    x = 8,753,164.98/3,944.90
  6. Step 6: Final answer
    x = 2,218.86

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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.