Home / 1,689.10-2,331.35-1,098.61

Finding the Fourth Proportional to 1,689.10, 2,331.35 and 1,098.61

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Solution

The fourth proportional to 1,689.10, 2,331.35 and 1,098.61 is: 1,516.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.10 : 2,331.35 = 1,098.61 : x
  2. Step 2: Convert to fraction form
    1,689.10/2,331.35 = 1,098.61/x
  3. Step 3: Cross multiply
    1,689.10x = 2,331.35 × 1,098.61
  4. Step 4: Simplify right side
    1,689.10x = 2,561,244.42
  5. Step 5: Solve for x
    x = 2,561,244.42/1,689.10
  6. Step 6: Final answer
    x = 1,516.34

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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.