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Finding the Fourth Proportional to 229,720.80, 343,609.20 and 206,198.40

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Solution

The fourth proportional to 229,720.80, 343,609.20 and 206,198.40 is: 308,425.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,720.80 : 343,609.20 = 206,198.40 : x
  2. Step 2: Convert to fraction form
    229,720.80/343,609.20 = 206,198.40/x
  3. Step 3: Cross multiply
    229,720.80x = 343,609.20 × 206,198.40
  4. Step 4: Simplify right side
    229,720.80x = 70,851,667,265.28
  5. Step 5: Solve for x
    x = 70,851,667,265.28/229,720.80
  6. Step 6: Final answer
    x = 308,425.13

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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.