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Finding the Fourth Proportional to 326,851.80, 490,305.96 and 90,194.49

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Solution

The fourth proportional to 326,851.80, 490,305.96 and 90,194.49 is: 135,299.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,851.80 : 490,305.96 = 90,194.49 : x
  2. Step 2: Convert to fraction form
    326,851.80/490,305.96 = 90,194.49/x
  3. Step 3: Cross multiply
    326,851.80x = 490,305.96 × 90,194.49
  4. Step 4: Simplify right side
    326,851.80x = 44,222,896,006.16
  5. Step 5: Solve for x
    x = 44,222,896,006.16/326,851.80
  6. Step 6: Final answer
    x = 135,299.53

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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.