Home / 2,139.13-3,209.55-1,043.20

Finding the Fourth Proportional to 2,139.13, 3,209.55 and 1,043.20

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Solution

The fourth proportional to 2,139.13, 3,209.55 and 1,043.20 is: 1,565.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.13 : 3,209.55 = 1,043.20 : x
  2. Step 2: Convert to fraction form
    2,139.13/3,209.55 = 1,043.20/x
  3. Step 3: Cross multiply
    2,139.13x = 3,209.55 × 1,043.20
  4. Step 4: Simplify right side
    2,139.13x = 3,348,202.56
  5. Step 5: Solve for x
    x = 3,348,202.56/2,139.13
  6. Step 6: Final answer
    x = 1,565.22

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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.