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Finding the Fourth Proportional to 396,409.57, 547,045.56 and 215,121.51

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Solution

The fourth proportional to 396,409.57, 547,045.56 and 215,121.51 is: 296,867.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,409.57 : 547,045.56 = 215,121.51 : x
  2. Step 2: Convert to fraction form
    396,409.57/547,045.56 = 215,121.51/x
  3. Step 3: Cross multiply
    396,409.57x = 547,045.56 × 215,121.51
  4. Step 4: Simplify right side
    396,409.57x = 117,681,266,906.00
  5. Step 5: Solve for x
    x = 117,681,266,906.00/396,409.57
  6. Step 6: Final answer
    x = 296,867.88

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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.