Home / 396,478.61-547,140.98-215,190.55

Finding the Fourth Proportional to 396,478.61, 547,140.98 and 215,190.55

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Solution

The fourth proportional to 396,478.61, 547,140.98 and 215,190.55 is: 296,963.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,478.61 : 547,140.98 = 215,190.55 : x
  2. Step 2: Convert to fraction form
    396,478.61/547,140.98 = 215,190.55/x
  3. Step 3: Cross multiply
    396,478.61x = 547,140.98 × 215,190.55
  4. Step 4: Simplify right side
    396,478.61x = 117,739,568,248.11
  5. Step 5: Solve for x
    x = 117,739,568,248.11/396,478.61
  6. Step 6: Final answer
    x = 296,963.23

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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.