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Finding the Fourth Proportional to 324,640.17, 487,134.34 and 135,231.39

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Solution

The fourth proportional to 324,640.17, 487,134.34 and 135,231.39 is: 202,919.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,640.17 : 487,134.34 = 135,231.39 : x
  2. Step 2: Convert to fraction form
    324,640.17/487,134.34 = 135,231.39/x
  3. Step 3: Cross multiply
    324,640.17x = 487,134.34 × 135,231.39
  4. Step 4: Simplify right side
    324,640.17x = 65,875,853,576.85
  5. Step 5: Solve for x
    x = 65,875,853,576.85/324,640.17
  6. Step 6: Final answer
    x = 202,919.60

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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.