Home / 1,605.40-2,403.54-1,240.90

Finding the Fourth Proportional to 1,605.40, 2,403.54 and 1,240.90

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Solution

The fourth proportional to 1,605.40, 2,403.54 and 1,240.90 is: 1,857.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.40 : 2,403.54 = 1,240.90 : x
  2. Step 2: Convert to fraction form
    1,605.40/2,403.54 = 1,240.90/x
  3. Step 3: Cross multiply
    1,605.40x = 2,403.54 × 1,240.90
  4. Step 4: Simplify right side
    1,605.40x = 2,982,546.78
  5. Step 5: Solve for x
    x = 2,982,546.78/1,605.40
  6. Step 6: Final answer
    x = 1,857.82

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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.