Home / 1,689.19-2,330.82-943.12

Finding the Fourth Proportional to 1,689.19, 2,330.82 and 943.12

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Solution

The fourth proportional to 1,689.19, 2,330.82 and 943.12 is: 1,301.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.19 : 2,330.82 = 943.12 : x
  2. Step 2: Convert to fraction form
    1,689.19/2,330.82 = 943.12/x
  3. Step 3: Cross multiply
    1,689.19x = 2,330.82 × 943.12
  4. Step 4: Simplify right side
    1,689.19x = 2,198,242.96
  5. Step 5: Solve for x
    x = 2,198,242.96/1,689.19
  6. Step 6: Final answer
    x = 1,301.36

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Half scale
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Double scale
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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.