Home / 1,689.50-2,331.25-943.43

Finding the Fourth Proportional to 1,689.50, 2,331.25 and 943.43

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Solution

The fourth proportional to 1,689.50, 2,331.25 and 943.43 is: 1,301.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.50 : 2,331.25 = 943.43 : x
  2. Step 2: Convert to fraction form
    1,689.50/2,331.25 = 943.43/x
  3. Step 3: Cross multiply
    1,689.50x = 2,331.25 × 943.43
  4. Step 4: Simplify right side
    1,689.50x = 2,199,357.17
  5. Step 5: Solve for x
    x = 2,199,357.17/1,689.50
  6. Step 6: Final answer
    x = 1,301.78

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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.