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Finding the Fourth Proportional to 396,380.88, 547,459.80 and 261,019.92

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Solution

The fourth proportional to 396,380.88, 547,459.80 and 261,019.92 is: 360,506.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,380.88 : 547,459.80 = 261,019.92 : x
  2. Step 2: Convert to fraction form
    396,380.88/547,459.80 = 261,019.92/x
  3. Step 3: Cross multiply
    396,380.88x = 547,459.80 × 261,019.92
  4. Step 4: Simplify right side
    396,380.88x = 142,897,913,199.22
  5. Step 5: Solve for x
    x = 142,897,913,199.22/396,380.88
  6. Step 6: Final answer
    x = 360,506.57

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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.