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Finding the Fourth Proportional to 396,857.61, 547,142.36 and 286,383.55

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Solution

The fourth proportional to 396,857.61, 547,142.36 and 286,383.55 is: 394,833.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,857.61 : 547,142.36 = 286,383.55 : x
  2. Step 2: Convert to fraction form
    396,857.61/547,142.36 = 286,383.55/x
  3. Step 3: Cross multiply
    396,857.61x = 547,142.36 × 286,383.55
  4. Step 4: Simplify right side
    396,857.61x = 156,692,568,676.47
  5. Step 5: Solve for x
    x = 156,692,568,676.47/396,857.61
  6. Step 6: Final answer
    x = 394,833.23

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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.