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Finding the Fourth Proportional to 396,483.78, 547,148.22 and 215,195.78

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Solution

The fourth proportional to 396,483.78, 547,148.22 and 215,195.78 is: 296,970.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,483.78 : 547,148.22 = 215,195.78 : x
  2. Step 2: Convert to fraction form
    396,483.78/547,148.22 = 215,195.78/x
  3. Step 3: Cross multiply
    396,483.78x = 547,148.22 × 215,195.78
  4. Step 4: Simplify right side
    396,483.78x = 117,743,986,134.18
  5. Step 5: Solve for x
    x = 117,743,986,134.18/396,483.78
  6. Step 6: Final answer
    x = 296,970.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.