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Finding the Fourth Proportional to 396,479.53, 547,143.39 and 215,191.72

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Solution

The fourth proportional to 396,479.53, 547,143.39 and 215,191.72 is: 296,965.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,479.53 : 547,143.39 = 215,191.72 : x
  2. Step 2: Convert to fraction form
    396,479.53/547,143.39 = 215,191.72/x
  3. Step 3: Cross multiply
    396,479.53x = 547,143.39 × 215,191.72
  4. Step 4: Simplify right side
    396,479.53x = 117,740,724,445.01
  5. Step 5: Solve for x
    x = 117,740,724,445.01/396,479.53
  6. Step 6: Final answer
    x = 296,965.46

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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.