Home / 1,284.85-1,917.97-1,129.15

Finding the Fourth Proportional to 1,284.85, 1,917.97 and 1,129.15

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Solution

The fourth proportional to 1,284.85, 1,917.97 and 1,129.15 is: 1,685.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.85 : 1,917.97 = 1,129.15 : x
  2. Step 2: Convert to fraction form
    1,284.85/1,917.97 = 1,129.15/x
  3. Step 3: Cross multiply
    1,284.85x = 1,917.97 × 1,129.15
  4. Step 4: Simplify right side
    1,284.85x = 2,165,675.83
  5. Step 5: Solve for x
    x = 2,165,675.83/1,284.85
  6. Step 6: Final answer
    x = 1,685.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.