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Finding the Fourth Proportional to 326,821.74, 490,260.85 and 90,164.42

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Solution

The fourth proportional to 326,821.74, 490,260.85 and 90,164.42 is: 135,254.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,821.74 : 490,260.85 = 90,164.42 : x
  2. Step 2: Convert to fraction form
    326,821.74/490,260.85 = 90,164.42/x
  3. Step 3: Cross multiply
    326,821.74x = 490,260.85 × 90,164.42
  4. Step 4: Simplify right side
    326,821.74x = 44,204,083,479.04
  5. Step 5: Solve for x
    x = 44,204,083,479.04/326,821.74
  6. Step 6: Final answer
    x = 135,254.42

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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.