Home / 1,781.20-2,459.62-1,119.20

Finding the Fourth Proportional to 1,781.20, 2,459.62 and 1,119.20

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Solution

The fourth proportional to 1,781.20, 2,459.62 and 1,119.20 is: 1,545.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.20 : 2,459.62 = 1,119.20 : x
  2. Step 2: Convert to fraction form
    1,781.20/2,459.62 = 1,119.20/x
  3. Step 3: Cross multiply
    1,781.20x = 2,459.62 × 1,119.20
  4. Step 4: Simplify right side
    1,781.20x = 2,752,806.70
  5. Step 5: Solve for x
    x = 2,752,806.70/1,781.20
  6. Step 6: Final answer
    x = 1,545.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.