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Finding the Fourth Proportional to 266,961.40, 399,858.90 and 207,329.20

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Solution

The fourth proportional to 266,961.40, 399,858.90 and 207,329.20 is: 310,540.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,961.40 : 399,858.90 = 207,329.20 : x
  2. Step 2: Convert to fraction form
    266,961.40/399,858.90 = 207,329.20/x
  3. Step 3: Cross multiply
    266,961.40x = 399,858.90 × 207,329.20
  4. Step 4: Simplify right side
    266,961.40x = 82,902,425,849.88
  5. Step 5: Solve for x
    x = 82,902,425,849.88/266,961.40
  6. Step 6: Final answer
    x = 310,540.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.