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Finding the Fourth Proportional to 396,796.56, 547,583.21 and 215,510.19

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Solution

The fourth proportional to 396,796.56, 547,583.21 and 215,510.19 is: 297,406.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,796.56 : 547,583.21 = 215,510.19 : x
  2. Step 2: Convert to fraction form
    396,796.56/547,583.21 = 215,510.19/x
  3. Step 3: Cross multiply
    396,796.56x = 547,583.21 × 215,510.19
  4. Step 4: Simplify right side
    396,796.56x = 118,009,761,627.91
  5. Step 5: Solve for x
    x = 118,009,761,627.91/396,796.56
  6. Step 6: Final answer
    x = 297,406.21

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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.