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Finding the Fourth Proportional to 2,806.08, 4,209.74 and 858.43

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Solution

The fourth proportional to 2,806.08, 4,209.74 and 858.43 is: 1,287.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,806.08 : 4,209.74 = 858.43 : x
  2. Step 2: Convert to fraction form
    2,806.08/4,209.74 = 858.43/x
  3. Step 3: Cross multiply
    2,806.08x = 4,209.74 × 858.43
  4. Step 4: Simplify right side
    2,806.08x = 3,613,767.11
  5. Step 5: Solve for x
    x = 3,613,767.11/2,806.08
  6. Step 6: Final answer
    x = 1,287.83

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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.