Home / 3,128.60-4,694.20-1,372.70

Finding the Fourth Proportional to 3,128.60, 4,694.20 and 1,372.70

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Solution

The fourth proportional to 3,128.60, 4,694.20 and 1,372.70 is: 2,059.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.60 : 4,694.20 = 1,372.70 : x
  2. Step 2: Convert to fraction form
    3,128.60/4,694.20 = 1,372.70/x
  3. Step 3: Cross multiply
    3,128.60x = 4,694.20 × 1,372.70
  4. Step 4: Simplify right side
    3,128.60x = 6,443,717.96
  5. Step 5: Solve for x
    x = 6,443,717.96/3,128.60
  6. Step 6: Final answer
    x = 2,059.62

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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.