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Finding the Fourth Proportional to 324,363.70, 486,286.35 and 137,221.30

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Solution

The fourth proportional to 324,363.70, 486,286.35 and 137,221.30 is: 205,722.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,363.70 : 486,286.35 = 137,221.30 : x
  2. Step 2: Convert to fraction form
    324,363.70/486,286.35 = 137,221.30/x
  3. Step 3: Cross multiply
    324,363.70x = 486,286.35 × 137,221.30
  4. Step 4: Simplify right side
    324,363.70x = 66,728,845,119.26
  5. Step 5: Solve for x
    x = 66,728,845,119.26/324,363.70
  6. Step 6: Final answer
    x = 205,722.30

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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.