Home / 1,778.20-2,452.92-1,187.92

Finding the Fourth Proportional to 1,778.20, 2,452.92 and 1,187.92

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Solution

The fourth proportional to 1,778.20, 2,452.92 and 1,187.92 is: 1,638.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.20 : 2,452.92 = 1,187.92 : x
  2. Step 2: Convert to fraction form
    1,778.20/2,452.92 = 1,187.92/x
  3. Step 3: Cross multiply
    1,778.20x = 2,452.92 × 1,187.92
  4. Step 4: Simplify right side
    1,778.20x = 2,913,872.73
  5. Step 5: Solve for x
    x = 2,913,872.73/1,778.20
  6. Step 6: Final answer
    x = 1,638.66

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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.