Home / 1,691.45-2,334.20-1,028.18

Finding the Fourth Proportional to 1,691.45, 2,334.20 and 1,028.18

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Solution

The fourth proportional to 1,691.45, 2,334.20 and 1,028.18 is: 1,418.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.45 : 2,334.20 = 1,028.18 : x
  2. Step 2: Convert to fraction form
    1,691.45/2,334.20 = 1,028.18/x
  3. Step 3: Cross multiply
    1,691.45x = 2,334.20 × 1,028.18
  4. Step 4: Simplify right side
    1,691.45x = 2,399,960.94
  5. Step 5: Solve for x
    x = 2,399,960.94/1,691.45
  6. Step 6: Final answer
    x = 1,418.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.