Home / 2,778.15-4,166.33-928.79

Finding the Fourth Proportional to 2,778.15, 4,166.33 and 928.79

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Solution

The fourth proportional to 2,778.15, 4,166.33 and 928.79 is: 1,392.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.15 : 4,166.33 = 928.79 : x
  2. Step 2: Convert to fraction form
    2,778.15/4,166.33 = 928.79/x
  3. Step 3: Cross multiply
    2,778.15x = 4,166.33 × 928.79
  4. Step 4: Simplify right side
    2,778.15x = 3,869,620.17
  5. Step 5: Solve for x
    x = 3,869,620.17/2,778.15
  6. Step 6: Final answer
    x = 1,392.88

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1.5x scale

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.