Home / 3,943.28-5,915.38-1,478.05

Finding the Fourth Proportional to 3,943.28, 5,915.38 and 1,478.05

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Solution

The fourth proportional to 3,943.28, 5,915.38 and 1,478.05 is: 2,217.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,943.28 : 5,915.38 = 1,478.05 : x
  2. Step 2: Convert to fraction form
    3,943.28/5,915.38 = 1,478.05/x
  3. Step 3: Cross multiply
    3,943.28x = 5,915.38 × 1,478.05
  4. Step 4: Simplify right side
    3,943.28x = 8,743,211.70
  5. Step 5: Solve for x
    x = 8,743,211.70/3,943.28
  6. Step 6: Final answer
    x = 2,217.24

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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.