Home / 396,720.72-547,463.88-215,424.36

Finding the Fourth Proportional to 396,720.72, 547,463.88 and 215,424.36

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Solution

The fourth proportional to 396,720.72, 547,463.88 and 215,424.36 is: 297,279.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,720.72 : 547,463.88 = 215,424.36 : x
  2. Step 2: Convert to fraction form
    396,720.72/547,463.88 = 215,424.36/x
  3. Step 3: Cross multiply
    396,720.72x = 547,463.88 × 215,424.36
  4. Step 4: Simplify right side
    396,720.72x = 117,937,055,972.12
  5. Step 5: Solve for x
    x = 117,937,055,972.12/396,720.72
  6. Step 6: Final answer
    x = 297,279.80

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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.