Home / 1,687.10-2,529.97-1,139.54

Finding the Fourth Proportional to 1,687.10, 2,529.97 and 1,139.54

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Solution

The fourth proportional to 1,687.10, 2,529.97 and 1,139.54 is: 1,708.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.10 : 2,529.97 = 1,139.54 : x
  2. Step 2: Convert to fraction form
    1,687.10/2,529.97 = 1,139.54/x
  3. Step 3: Cross multiply
    1,687.10x = 2,529.97 × 1,139.54
  4. Step 4: Simplify right side
    1,687.10x = 2,883,002.01
  5. Step 5: Solve for x
    x = 2,883,002.01/1,687.10
  6. Step 6: Final answer
    x = 1,708.85

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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.