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Finding the Fourth Proportional to 396,485.78, 547,150.98 and 215,197.78

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Solution

The fourth proportional to 396,485.78, 547,150.98 and 215,197.78 is: 296,973.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,485.78 : 547,150.98 = 215,197.78 : x
  2. Step 2: Convert to fraction form
    396,485.78/547,150.98 = 215,197.78/x
  3. Step 3: Cross multiply
    396,485.78x = 547,150.98 × 215,197.78
  4. Step 4: Simplify right side
    396,485.78x = 117,745,676,220.82
  5. Step 5: Solve for x
    x = 117,745,676,220.82/396,485.78
  6. Step 6: Final answer
    x = 296,973.26

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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.