Home / 1,414.78-2,120.04-1,279.91

Finding the Fourth Proportional to 1,414.78, 2,120.04 and 1,279.91

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Solution

The fourth proportional to 1,414.78, 2,120.04 and 1,279.91 is: 1,917.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,414.78 : 2,120.04 = 1,279.91 : x
  2. Step 2: Convert to fraction form
    1,414.78/2,120.04 = 1,279.91/x
  3. Step 3: Cross multiply
    1,414.78x = 2,120.04 × 1,279.91
  4. Step 4: Simplify right side
    1,414.78x = 2,713,465.70
  5. Step 5: Solve for x
    x = 2,713,465.70/1,414.78
  6. Step 6: Final answer
    x = 1,917.95

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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.