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Finding the Fourth Proportional to 326,900.97, 490,379.67 and 90,243.69

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Solution

The fourth proportional to 326,900.97, 490,379.67 and 90,243.69 is: 135,373.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,900.97 : 490,379.67 = 90,243.69 : x
  2. Step 2: Convert to fraction form
    326,900.97/490,379.67 = 90,243.69/x
  3. Step 3: Cross multiply
    326,900.97x = 490,379.67 × 90,243.69
  4. Step 4: Simplify right side
    326,900.97x = 44,253,670,921.78
  5. Step 5: Solve for x
    x = 44,253,670,921.78/326,900.97
  6. Step 6: Final answer
    x = 135,373.32

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1.5x scale

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.