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Finding the Fourth Proportional to 2,770.16, 4,155.24 and 920.79

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Solution

The fourth proportional to 2,770.16, 4,155.24 and 920.79 is: 1,381.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,770.16 : 4,155.24 = 920.79 : x
  2. Step 2: Convert to fraction form
    2,770.16/4,155.24 = 920.79/x
  3. Step 3: Cross multiply
    2,770.16x = 4,155.24 × 920.79
  4. Step 4: Simplify right side
    2,770.16x = 3,826,103.44
  5. Step 5: Solve for x
    x = 3,826,103.44/2,770.16
  6. Step 6: Final answer
    x = 1,381.19

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Similar ratio
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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.