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Finding the Fourth Proportional to 3,857.01, 5,780.61 and 3,215.49

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Solution

The fourth proportional to 3,857.01, 5,780.61 and 3,215.49 is: 4,819.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.01 : 5,780.61 = 3,215.49 : x
  2. Step 2: Convert to fraction form
    3,857.01/5,780.61 = 3,215.49/x
  3. Step 3: Cross multiply
    3,857.01x = 5,780.61 × 3,215.49
  4. Step 4: Simplify right side
    3,857.01x = 18,587,493.65
  5. Step 5: Solve for x
    x = 18,587,493.65/3,857.01
  6. Step 6: Final answer
    x = 4,819.15

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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.