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Finding the Fourth Proportional to 491,376.11, 678,096.90 and 276,519.83

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Solution

The fourth proportional to 491,376.11, 678,096.90 and 276,519.83 is: 381,596.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,376.11 : 678,096.90 = 276,519.83 : x
  2. Step 2: Convert to fraction form
    491,376.11/678,096.90 = 276,519.83/x
  3. Step 3: Cross multiply
    491,376.11x = 678,096.90 × 276,519.83
  4. Step 4: Simplify right side
    491,376.11x = 187,507,236,121.04
  5. Step 5: Solve for x
    x = 187,507,236,121.04/491,376.11
  6. Step 6: Final answer
    x = 381,596.16

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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.