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Finding the Fourth Proportional to 3,847.92, 5,306.58 and 2,855.67

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Solution

The fourth proportional to 3,847.92, 5,306.58 and 2,855.67 is: 3,938.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,847.92 : 5,306.58 = 2,855.67 : x
  2. Step 2: Convert to fraction form
    3,847.92/5,306.58 = 2,855.67/x
  3. Step 3: Cross multiply
    3,847.92x = 5,306.58 × 2,855.67
  4. Step 4: Simplify right side
    3,847.92x = 15,153,841.31
  5. Step 5: Solve for x
    x = 15,153,841.31/3,847.92
  6. Step 6: Final answer
    x = 3,938.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.