Home / 2,689.10-4,027.17-1,820.78

Finding the Fourth Proportional to 2,689.10, 4,027.17 and 1,820.78

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Solution

The fourth proportional to 2,689.10, 4,027.17 and 1,820.78 is: 2,726.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.10 : 4,027.17 = 1,820.78 : x
  2. Step 2: Convert to fraction form
    2,689.10/4,027.17 = 1,820.78/x
  3. Step 3: Cross multiply
    2,689.10x = 4,027.17 × 1,820.78
  4. Step 4: Simplify right side
    2,689.10x = 7,332,590.59
  5. Step 5: Solve for x
    x = 7,332,590.59/2,689.10
  6. Step 6: Final answer
    x = 2,726.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.