Home / 3,581.64-5,372.76-1,390.20

Finding the Fourth Proportional to 3,581.64, 5,372.76 and 1,390.20

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Solution

The fourth proportional to 3,581.64, 5,372.76 and 1,390.20 is: 2,085.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,581.64 : 5,372.76 = 1,390.20 : x
  2. Step 2: Convert to fraction form
    3,581.64/5,372.76 = 1,390.20/x
  3. Step 3: Cross multiply
    3,581.64x = 5,372.76 × 1,390.20
  4. Step 4: Simplify right side
    3,581.64x = 7,469,210.95
  5. Step 5: Solve for x
    x = 7,469,210.95/3,581.64
  6. Step 6: Final answer
    x = 2,085.42

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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.