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Finding the Fourth Proportional to 396,502.80, 547,174.40 and 215,214.76

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Solution

The fourth proportional to 396,502.80, 547,174.40 and 215,214.76 is: 296,996.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,502.80 : 547,174.40 = 215,214.76 : x
  2. Step 2: Convert to fraction form
    396,502.80/547,174.40 = 215,214.76/x
  3. Step 3: Cross multiply
    396,502.80x = 547,174.40 × 215,214.76
  4. Step 4: Simplify right side
    396,502.80x = 117,760,007,174.14
  5. Step 5: Solve for x
    x = 117,760,007,174.14/396,502.80
  6. Step 6: Final answer
    x = 296,996.66

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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.