Home / 1,689.24-2,331.24-943.38

Finding the Fourth Proportional to 1,689.24, 2,331.24 and 943.38

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Solution

The fourth proportional to 1,689.24, 2,331.24 and 943.38 is: 1,301.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.24 : 2,331.24 = 943.38 : x
  2. Step 2: Convert to fraction form
    1,689.24/2,331.24 = 943.38/x
  3. Step 3: Cross multiply
    1,689.24x = 2,331.24 × 943.38
  4. Step 4: Simplify right side
    1,689.24x = 2,199,245.19
  5. Step 5: Solve for x
    x = 2,199,245.19/1,689.24
  6. Step 6: Final answer
    x = 1,301.91

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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.