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Finding the Fourth Proportional to 396,943.44, 547,782.72 and 215,653.80

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Solution

The fourth proportional to 396,943.44, 547,782.72 and 215,653.80 is: 297,602.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,943.44 : 547,782.72 = 215,653.80 : x
  2. Step 2: Convert to fraction form
    396,943.44/547,782.72 = 215,653.80/x
  3. Step 3: Cross multiply
    396,943.44x = 547,782.72 × 215,653.80
  4. Step 4: Simplify right side
    396,943.44x = 118,131,425,142.34
  5. Step 5: Solve for x
    x = 118,131,425,142.34/396,943.44
  6. Step 6: Final answer
    x = 297,602.66

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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.