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Finding the Fourth Proportional to 491,776.40, 678,687.72 and 276,939.92

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Solution

The fourth proportional to 491,776.40, 678,687.72 and 276,939.92 is: 382,197.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,776.40 : 678,687.72 = 276,939.92 : x
  2. Step 2: Convert to fraction form
    491,776.40/678,687.72 = 276,939.92/x
  3. Step 3: Cross multiply
    491,776.40x = 678,687.72 × 276,939.92
  4. Step 4: Simplify right side
    491,776.40x = 187,955,722,881.78
  5. Step 5: Solve for x
    x = 187,955,722,881.78/491,776.40
  6. Step 6: Final answer
    x = 382,197.52

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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.