Home / 1,778.36-2,456.14-1,187.88

Finding the Fourth Proportional to 1,778.36, 2,456.14 and 1,187.88

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Solution

The fourth proportional to 1,778.36, 2,456.14 and 1,187.88 is: 1,640.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.36 : 2,456.14 = 1,187.88 : x
  2. Step 2: Convert to fraction form
    1,778.36/2,456.14 = 1,187.88/x
  3. Step 3: Cross multiply
    1,778.36x = 2,456.14 × 1,187.88
  4. Step 4: Simplify right side
    1,778.36x = 2,917,599.58
  5. Step 5: Solve for x
    x = 2,917,599.58/1,778.36
  6. Step 6: Final answer
    x = 1,640.61

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1.5x scale

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.