Home / 3,128.91-4,317.14-1,949.15

Finding the Fourth Proportional to 3,128.91, 4,317.14 and 1,949.15

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Solution

The fourth proportional to 3,128.91, 4,317.14 and 1,949.15 is: 2,689.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.91 : 4,317.14 = 1,949.15 : x
  2. Step 2: Convert to fraction form
    3,128.91/4,317.14 = 1,949.15/x
  3. Step 3: Cross multiply
    3,128.91x = 4,317.14 × 1,949.15
  4. Step 4: Simplify right side
    3,128.91x = 8,414,722.10
  5. Step 5: Solve for x
    x = 8,414,722.10/3,128.91
  6. Step 6: Final answer
    x = 2,689.35

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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.