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Finding the Fourth Proportional to 396,509.01, 547,182.96 and 215,220.97

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Solution

The fourth proportional to 396,509.01, 547,182.96 and 215,220.97 is: 297,005.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,509.01 : 547,182.96 = 215,220.97 : x
  2. Step 2: Convert to fraction form
    396,509.01/547,182.96 = 215,220.97/x
  3. Step 3: Cross multiply
    396,509.01x = 547,182.96 × 215,220.97
  4. Step 4: Simplify right side
    396,509.01x = 117,765,247,418.67
  5. Step 5: Solve for x
    x = 117,765,247,418.67/396,509.01
  6. Step 6: Final answer
    x = 297,005.22

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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.