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Finding the Fourth Proportional to 396,393.76, 547,020.66 and 215,101.12

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Solution

The fourth proportional to 396,393.76, 547,020.66 and 215,101.12 is: 296,838.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,393.76 : 547,020.66 = 215,101.12 : x
  2. Step 2: Convert to fraction form
    396,393.76/547,020.66 = 215,101.12/x
  3. Step 3: Cross multiply
    396,393.76x = 547,020.66 × 215,101.12
  4. Step 4: Simplify right side
    396,393.76x = 117,664,756,629.14
  5. Step 5: Solve for x
    x = 117,664,756,629.14/396,393.76
  6. Step 6: Final answer
    x = 296,838.06

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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.