Home / 1,340.40-2,010.89-403.30

Finding the Fourth Proportional to 1,340.40, 2,010.89 and 403.30

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Solution

The fourth proportional to 1,340.40, 2,010.89 and 403.30 is: 605.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.40 : 2,010.89 = 403.30 : x
  2. Step 2: Convert to fraction form
    1,340.40/2,010.89 = 403.30/x
  3. Step 3: Cross multiply
    1,340.40x = 2,010.89 × 403.30
  4. Step 4: Simplify right side
    1,340.40x = 810,991.94
  5. Step 5: Solve for x
    x = 810,991.94/1,340.40
  6. Step 6: Final answer
    x = 605.04

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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.