Home / 1,340.97-2,011.38-403.90

Finding the Fourth Proportional to 1,340.97, 2,011.38 and 403.90

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Solution

The fourth proportional to 1,340.97, 2,011.38 and 403.90 is: 605.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.97 : 2,011.38 = 403.90 : x
  2. Step 2: Convert to fraction form
    1,340.97/2,011.38 = 403.90/x
  3. Step 3: Cross multiply
    1,340.97x = 2,011.38 × 403.90
  4. Step 4: Simplify right side
    1,340.97x = 812,396.38
  5. Step 5: Solve for x
    x = 812,396.38/1,340.97
  6. Step 6: Final answer
    x = 605.83

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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.