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Finding the Fourth Proportional to 324,872.40, 487,308.60 and 137,859.60

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Solution

The fourth proportional to 324,872.40, 487,308.60 and 137,859.60 is: 206,789.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,872.40 : 487,308.60 = 137,859.60 : x
  2. Step 2: Convert to fraction form
    324,872.40/487,308.60 = 137,859.60/x
  3. Step 3: Cross multiply
    324,872.40x = 487,308.60 × 137,859.60
  4. Step 4: Simplify right side
    324,872.40x = 67,180,168,672.56
  5. Step 5: Solve for x
    x = 67,180,168,672.56/324,872.40
  6. Step 6: Final answer
    x = 206,789.40

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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.