Home / 1,689.16-2,330.96-943.10

Finding the Fourth Proportional to 1,689.16, 2,330.96 and 943.10

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Solution

The fourth proportional to 1,689.16, 2,330.96 and 943.10 is: 1,301.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.16 : 2,330.96 = 943.10 : x
  2. Step 2: Convert to fraction form
    1,689.16/2,330.96 = 943.10/x
  3. Step 3: Cross multiply
    1,689.16x = 2,330.96 × 943.10
  4. Step 4: Simplify right side
    1,689.16x = 2,198,328.38
  5. Step 5: Solve for x
    x = 2,198,328.38/1,689.16
  6. Step 6: Final answer
    x = 1,301.43

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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.