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Finding the Fourth Proportional to 806.00, 1,209.20 and 343.98

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Solution

The fourth proportional to 806.00, 1,209.20 and 343.98 is: 516.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.00 : 1,209.20 = 343.98 : x
  2. Step 2: Convert to fraction form
    806.00/1,209.20 = 343.98/x
  3. Step 3: Cross multiply
    806.00x = 1,209.20 × 343.98
  4. Step 4: Simplify right side
    806.00x = 415,938.90
  5. Step 5: Solve for x
    x = 415,938.90/806.00
  6. Step 6: Final answer
    x = 516.06

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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.