Home / 1,689.25-2,330.90-943.18

Finding the Fourth Proportional to 1,689.25, 2,330.90 and 943.18

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Solution

The fourth proportional to 1,689.25, 2,330.90 and 943.18 is: 1,301.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.25 : 2,330.90 = 943.18 : x
  2. Step 2: Convert to fraction form
    1,689.25/2,330.90 = 943.18/x
  3. Step 3: Cross multiply
    1,689.25x = 2,330.90 × 943.18
  4. Step 4: Simplify right side
    1,689.25x = 2,198,448.97
  5. Step 5: Solve for x
    x = 2,198,448.97/1,689.25
  6. Step 6: Final answer
    x = 1,301.43

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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.