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Finding the Fourth Proportional to 396,381.76, 547,004.05 and 215,089.08

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Solution

The fourth proportional to 396,381.76, 547,004.05 and 215,089.08 is: 296,821.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,381.76 : 547,004.05 = 215,089.08 : x
  2. Step 2: Convert to fraction form
    396,381.76/547,004.05 = 215,089.08/x
  3. Step 3: Cross multiply
    396,381.76x = 547,004.05 × 215,089.08
  4. Step 4: Simplify right side
    396,381.76x = 117,654,597,870.77
  5. Step 5: Solve for x
    x = 117,654,597,870.77/396,381.76
  6. Step 6: Final answer
    x = 296,821.42

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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.