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Finding the Fourth Proportional to 396,600, 547,308.01 and 215,311.67

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Solution

The fourth proportional to 396,600, 547,308.01 and 215,311.67 is: 297,130.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,600 : 547,308.01 = 215,311.67 : x
  2. Step 2: Convert to fraction form
    396,600/547,308.01 = 215,311.67/x
  3. Step 3: Cross multiply
    396,600x = 547,308.01 × 215,311.67
  4. Step 4: Simplify right side
    396,600x = 117,841,801,637.48
  5. Step 5: Solve for x
    x = 117,841,801,637.48/396,600
  6. Step 6: Final answer
    x = 297,130.11

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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.