Home / 1,689.17-2,328.26-1,129.43

Finding the Fourth Proportional to 1,689.17, 2,328.26 and 1,129.43

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Solution

The fourth proportional to 1,689.17, 2,328.26 and 1,129.43 is: 1,556.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.17 : 2,328.26 = 1,129.43 : x
  2. Step 2: Convert to fraction form
    1,689.17/2,328.26 = 1,129.43/x
  3. Step 3: Cross multiply
    1,689.17x = 2,328.26 × 1,129.43
  4. Step 4: Simplify right side
    1,689.17x = 2,629,606.69
  5. Step 5: Solve for x
    x = 2,629,606.69/1,689.17
  6. Step 6: Final answer
    x = 1,556.75

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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.