Home / 1,689.38-2,331.31-943.34

Finding the Fourth Proportional to 1,689.38, 2,331.31 and 943.34

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Solution

The fourth proportional to 1,689.38, 2,331.31 and 943.34 is: 1,301.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.38 : 2,331.31 = 943.34 : x
  2. Step 2: Convert to fraction form
    1,689.38/2,331.31 = 943.34/x
  3. Step 3: Cross multiply
    1,689.38x = 2,331.31 × 943.34
  4. Step 4: Simplify right side
    1,689.38x = 2,199,229.35
  5. Step 5: Solve for x
    x = 2,199,229.35/1,689.38
  6. Step 6: Final answer
    x = 1,301.80

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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.