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Finding the Fourth Proportional to 3,082.85, 4,624.41 and 861.83

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Solution

The fourth proportional to 3,082.85, 4,624.41 and 861.83 is: 1,292.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,082.85 : 4,624.41 = 861.83 : x
  2. Step 2: Convert to fraction form
    3,082.85/4,624.41 = 861.83/x
  3. Step 3: Cross multiply
    3,082.85x = 4,624.41 × 861.83
  4. Step 4: Simplify right side
    3,082.85x = 3,985,432.15
  5. Step 5: Solve for x
    x = 3,985,432.15/3,082.85
  6. Step 6: Final answer
    x = 1,292.78

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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.