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Finding the Fourth Proportional to 396,069, 546,609.78 and 217,255.56

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Solution

The fourth proportional to 396,069, 546,609.78 and 217,255.56 is: 299,831.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,069 : 546,609.78 = 217,255.56 : x
  2. Step 2: Convert to fraction form
    396,069/546,609.78 = 217,255.56/x
  3. Step 3: Cross multiply
    396,069x = 546,609.78 × 217,255.56
  4. Step 4: Simplify right side
    396,069x = 118,754,013,855.38
  5. Step 5: Solve for x
    x = 118,754,013,855.38/396,069
  6. Step 6: Final answer
    x = 299,831.63

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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.