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Finding the Fourth Proportional to 396,931, 547,773.42 and 218,083

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Solution

The fourth proportional to 396,931, 547,773.42 and 218,083 is: 300,959.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,931 : 547,773.42 = 218,083 : x
  2. Step 2: Convert to fraction form
    396,931/547,773.42 = 218,083/x
  3. Step 3: Cross multiply
    396,931x = 547,773.42 × 218,083
  4. Step 4: Simplify right side
    396,931x = 119,460,070,753.86
  5. Step 5: Solve for x
    x = 119,460,070,753.86/396,931
  6. Step 6: Final answer
    x = 300,959.29

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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.