Home / 1,687.50-2,531.24-1,298.20

Finding the Fourth Proportional to 1,687.50, 2,531.24 and 1,298.20

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Solution

The fourth proportional to 1,687.50, 2,531.24 and 1,298.20 is: 1,947.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.50 : 2,531.24 = 1,298.20 : x
  2. Step 2: Convert to fraction form
    1,687.50/2,531.24 = 1,298.20/x
  3. Step 3: Cross multiply
    1,687.50x = 2,531.24 × 1,298.20
  4. Step 4: Simplify right side
    1,687.50x = 3,286,055.77
  5. Step 5: Solve for x
    x = 3,286,055.77/1,687.50
  6. Step 6: Final answer
    x = 1,947.29

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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.