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Finding the Fourth Proportional to 491,405.76, 678,153.24 and 276,553.44

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Solution

The fourth proportional to 491,405.76, 678,153.24 and 276,553.44 is: 381,651.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,405.76 : 678,153.24 = 276,553.44 : x
  2. Step 2: Convert to fraction form
    491,405.76/678,153.24 = 276,553.44/x
  3. Step 3: Cross multiply
    491,405.76x = 678,153.24 × 276,553.44
  4. Step 4: Simplify right side
    491,405.76x = 187,545,611,369.15
  5. Step 5: Solve for x
    x = 187,545,611,369.15/491,405.76
  6. Step 6: Final answer
    x = 381,651.23

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1.5x scale

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.