Home / 1,517.22-2,275.18-640.11

Finding the Fourth Proportional to 1,517.22, 2,275.18 and 640.11

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Solution

The fourth proportional to 1,517.22, 2,275.18 and 640.11 is: 959.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,517.22 : 2,275.18 = 640.11 : x
  2. Step 2: Convert to fraction form
    1,517.22/2,275.18 = 640.11/x
  3. Step 3: Cross multiply
    1,517.22x = 2,275.18 × 640.11
  4. Step 4: Simplify right side
    1,517.22x = 1,456,374.80
  5. Step 5: Solve for x
    x = 1,456,374.80/1,517.22
  6. Step 6: Final answer
    x = 959.90

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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.