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Finding the Fourth Proportional to 381,648.50, 572,735.20 and 132,330.50

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Solution

The fourth proportional to 381,648.50, 572,735.20 and 132,330.50 is: 198,586.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,648.50 : 572,735.20 = 132,330.50 : x
  2. Step 2: Convert to fraction form
    381,648.50/572,735.20 = 132,330.50/x
  3. Step 3: Cross multiply
    381,648.50x = 572,735.20 × 132,330.50
  4. Step 4: Simplify right side
    381,648.50x = 75,790,335,383.60
  5. Step 5: Solve for x
    x = 75,790,335,383.60/381,648.50
  6. Step 6: Final answer
    x = 198,586.75

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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.