Home / 1,689.19-2,331.05-943.22

Finding the Fourth Proportional to 1,689.19, 2,331.05 and 943.22

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Solution

The fourth proportional to 1,689.19, 2,331.05 and 943.22 is: 1,301.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.19 : 2,331.05 = 943.22 : x
  2. Step 2: Convert to fraction form
    1,689.19/2,331.05 = 943.22/x
  3. Step 3: Cross multiply
    1,689.19x = 2,331.05 × 943.22
  4. Step 4: Simplify right side
    1,689.19x = 2,198,688.26
  5. Step 5: Solve for x
    x = 2,198,688.26/1,689.19
  6. Step 6: Final answer
    x = 1,301.62

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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.