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Finding the Fourth Proportional to 396,998.65, 547,861.47 and 215,710.58

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Solution

The fourth proportional to 396,998.65, 547,861.47 and 215,710.58 is: 297,682.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,998.65 : 547,861.47 = 215,710.58 : x
  2. Step 2: Convert to fraction form
    396,998.65/547,861.47 = 215,710.58/x
  3. Step 3: Cross multiply
    396,998.65x = 547,861.47 × 215,710.58
  4. Step 4: Simplify right side
    396,998.65x = 118,179,512,714.05
  5. Step 5: Solve for x
    x = 118,179,512,714.05/396,998.65
  6. Step 6: Final answer
    x = 297,682.41

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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.