Home / 1,340.13-2,010.20-724.13

Finding the Fourth Proportional to 1,340.13, 2,010.20 and 724.13

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Solution

The fourth proportional to 1,340.13, 2,010.20 and 724.13 is: 1,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.13 : 2,010.20 = 724.13 : x
  2. Step 2: Convert to fraction form
    1,340.13/2,010.20 = 724.13/x
  3. Step 3: Cross multiply
    1,340.13x = 2,010.20 × 724.13
  4. Step 4: Simplify right side
    1,340.13x = 1,455,646.13
  5. Step 5: Solve for x
    x = 1,455,646.13/1,340.13
  6. Step 6: Final answer
    x = 1,086.20

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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.