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Finding the Fourth Proportional to 396,607.94, 547,318.96 and 215,319.87

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Solution

The fourth proportional to 396,607.94, 547,318.96 and 215,319.87 is: 297,141.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,607.94 : 547,318.96 = 215,319.87 : x
  2. Step 2: Convert to fraction form
    396,607.94/547,318.96 = 215,319.87/x
  3. Step 3: Cross multiply
    396,607.94x = 547,318.96 × 215,319.87
  4. Step 4: Simplify right side
    396,607.94x = 117,848,643,502.54
  5. Step 5: Solve for x
    x = 117,848,643,502.54/396,607.94
  6. Step 6: Final answer
    x = 297,141.41

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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.