Home / 3,240.70-4,862.68-1,391.30

Finding the Fourth Proportional to 3,240.70, 4,862.68 and 1,391.30

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Solution

The fourth proportional to 3,240.70, 4,862.68 and 1,391.30 is: 2,087.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.70 : 4,862.68 = 1,391.30 : x
  2. Step 2: Convert to fraction form
    3,240.70/4,862.68 = 1,391.30/x
  3. Step 3: Cross multiply
    3,240.70x = 4,862.68 × 1,391.30
  4. Step 4: Simplify right side
    3,240.70x = 6,765,446.68
  5. Step 5: Solve for x
    x = 6,765,446.68/3,240.70
  6. Step 6: Final answer
    x = 2,087.65

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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.