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Finding the Fourth Proportional to 326,708.20, 490,062.30 and 206,860.60

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Solution

The fourth proportional to 326,708.20, 490,062.30 and 206,860.60 is: 310,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,708.20 : 490,062.30 = 206,860.60 : x
  2. Step 2: Convert to fraction form
    326,708.20/490,062.30 = 206,860.60/x
  3. Step 3: Cross multiply
    326,708.20x = 490,062.30 × 206,860.60
  4. Step 4: Simplify right side
    326,708.20x = 101,374,581,415.38
  5. Step 5: Solve for x
    x = 101,374,581,415.38/326,708.20
  6. Step 6: Final answer
    x = 310,290.90

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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.