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Finding the Fourth Proportional to 491,796.38, 678,672.33 and 276,939.02

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Solution

The fourth proportional to 491,796.38, 678,672.33 and 276,939.02 is: 382,172.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,796.38 : 678,672.33 = 276,939.02 : x
  2. Step 2: Convert to fraction form
    491,796.38/678,672.33 = 276,939.02/x
  3. Step 3: Cross multiply
    491,796.38x = 678,672.33 × 276,939.02
  4. Step 4: Simplify right side
    491,796.38x = 187,950,849,971.32
  5. Step 5: Solve for x
    x = 187,950,849,971.32/491,796.38
  6. Step 6: Final answer
    x = 382,172.09

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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.