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Finding the Fourth Proportional to 806.50, 1,209.84 and 344.26

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Solution

The fourth proportional to 806.50, 1,209.84 and 344.26 is: 516.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.50 : 1,209.84 = 344.26 : x
  2. Step 2: Convert to fraction form
    806.50/1,209.84 = 344.26/x
  3. Step 3: Cross multiply
    806.50x = 1,209.84 × 344.26
  4. Step 4: Simplify right side
    806.50x = 416,499.52
  5. Step 5: Solve for x
    x = 416,499.52/806.50
  6. Step 6: Final answer
    x = 516.43

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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.