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Finding the Fourth Proportional to 2,912.70, 4,369.05 and 2,855.10

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Solution

The fourth proportional to 2,912.70, 4,369.05 and 2,855.10 is: 4,282.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.70 : 4,369.05 = 2,855.10 : x
  2. Step 2: Convert to fraction form
    2,912.70/4,369.05 = 2,855.10/x
  3. Step 3: Cross multiply
    2,912.70x = 4,369.05 × 2,855.10
  4. Step 4: Simplify right side
    2,912.70x = 12,474,074.66
  5. Step 5: Solve for x
    x = 12,474,074.66/2,912.70
  6. Step 6: Final answer
    x = 4,282.65

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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.