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Finding the Fourth Proportional to 3,834.80, 5,752.20 and 3,186.80

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Solution

The fourth proportional to 3,834.80, 5,752.20 and 3,186.80 is: 4,780.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,834.80 : 5,752.20 = 3,186.80 : x
  2. Step 2: Convert to fraction form
    3,834.80/5,752.20 = 3,186.80/x
  3. Step 3: Cross multiply
    3,834.80x = 5,752.20 × 3,186.80
  4. Step 4: Simplify right side
    3,834.80x = 18,331,110.96
  5. Step 5: Solve for x
    x = 18,331,110.96/3,834.80
  6. Step 6: Final answer
    x = 4,780.20

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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.