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Finding the Fourth Proportional to 396,551.80, 547,251.39 and 215,263.68

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Solution

The fourth proportional to 396,551.80, 547,251.39 and 215,263.68 is: 297,069.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,551.80 : 547,251.39 = 215,263.68 : x
  2. Step 2: Convert to fraction form
    396,551.80/547,251.39 = 215,263.68/x
  3. Step 3: Cross multiply
    396,551.80x = 547,251.39 × 215,263.68
  4. Step 4: Simplify right side
    396,551.80x = 117,803,346,044.32
  5. Step 5: Solve for x
    x = 117,803,346,044.32/396,551.80
  6. Step 6: Final answer
    x = 297,069.25

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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.