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Finding the Fourth Proportional to 396,489.42, 547,154.01 and 215,201.35

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Solution

The fourth proportional to 396,489.42, 547,154.01 and 215,201.35 is: 296,977.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,489.42 : 547,154.01 = 215,201.35 : x
  2. Step 2: Convert to fraction form
    396,489.42/547,154.01 = 215,201.35/x
  3. Step 3: Cross multiply
    396,489.42x = 547,154.01 × 215,201.35
  4. Step 4: Simplify right side
    396,489.42x = 117,748,282,968.33
  5. Step 5: Solve for x
    x = 117,748,282,968.33/396,489.42
  6. Step 6: Final answer
    x = 296,977.11

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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.