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Finding the Fourth Proportional to 396,798.66, 547,586.10 and 215,514.14

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Solution

The fourth proportional to 396,798.66, 547,586.10 and 215,514.14 is: 297,411.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,798.66 : 547,586.10 = 215,514.14 : x
  2. Step 2: Convert to fraction form
    396,798.66/547,586.10 = 215,514.14/x
  3. Step 3: Cross multiply
    396,798.66x = 547,586.10 × 215,514.14
  4. Step 4: Simplify right side
    396,798.66x = 118,012,544,679.52
  5. Step 5: Solve for x
    x = 118,012,544,679.52/396,798.66
  6. Step 6: Final answer
    x = 297,411.65

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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.