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Finding the Fourth Proportional to 396,758.56, 547,156.56 and 305,968.90

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Solution

The fourth proportional to 396,758.56, 547,156.56 and 305,968.90 is: 421,951.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,758.56 : 547,156.56 = 305,968.90 : x
  2. Step 2: Convert to fraction form
    396,758.56/547,156.56 = 305,968.90/x
  3. Step 3: Cross multiply
    396,758.56x = 547,156.56 × 305,968.90
  4. Step 4: Simplify right side
    396,758.56x = 167,412,890,983.93
  5. Step 5: Solve for x
    x = 167,412,890,983.93/396,758.56
  6. Step 6: Final answer
    x = 421,951.55

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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.