Home / 1,278.92-1,920.69-1,176.02

Finding the Fourth Proportional to 1,278.92, 1,920.69 and 1,176.02

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Solution

The fourth proportional to 1,278.92, 1,920.69 and 1,176.02 is: 1,766.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.92 : 1,920.69 = 1,176.02 : x
  2. Step 2: Convert to fraction form
    1,278.92/1,920.69 = 1,176.02/x
  3. Step 3: Cross multiply
    1,278.92x = 1,920.69 × 1,176.02
  4. Step 4: Simplify right side
    1,278.92x = 2,258,760.25
  5. Step 5: Solve for x
    x = 2,258,760.25/1,278.92
  6. Step 6: Final answer
    x = 1,766.15

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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.