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Finding the Fourth Proportional to 330,528.32, 495,446.47 and 138,512.69

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Solution

The fourth proportional to 330,528.32, 495,446.47 and 138,512.69 is: 207,624.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,528.32 : 495,446.47 = 138,512.69 : x
  2. Step 2: Convert to fraction form
    330,528.32/495,446.47 = 138,512.69/x
  3. Step 3: Cross multiply
    330,528.32x = 495,446.47 × 138,512.69
  4. Step 4: Simplify right side
    330,528.32x = 68,625,623,310.70
  5. Step 5: Solve for x
    x = 68,625,623,310.70/330,528.32
  6. Step 6: Final answer
    x = 207,624.03

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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.