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Finding the Fourth Proportional to 396,466.87, 547,124.82 and 215,178.80

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Solution

The fourth proportional to 396,466.87, 547,124.82 and 215,178.80 is: 296,947.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,466.87 : 547,124.82 = 215,178.80 : x
  2. Step 2: Convert to fraction form
    396,466.87/547,124.82 = 215,178.80/x
  3. Step 3: Cross multiply
    396,466.87x = 547,124.82 × 215,178.80
  4. Step 4: Simplify right side
    396,466.87x = 117,729,658,406.30
  5. Step 5: Solve for x
    x = 117,729,658,406.30/396,466.87
  6. Step 6: Final answer
    x = 296,947.03

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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.