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Finding the Fourth Proportional to 276,640.80, 414,961.20 and 253,021.20

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Solution

The fourth proportional to 276,640.80, 414,961.20 and 253,021.20 is: 379,531.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,640.80 : 414,961.20 = 253,021.20 : x
  2. Step 2: Convert to fraction form
    276,640.80/414,961.20 = 253,021.20/x
  3. Step 3: Cross multiply
    276,640.80x = 414,961.20 × 253,021.20
  4. Step 4: Simplify right side
    276,640.80x = 104,993,980,777.44
  5. Step 5: Solve for x
    x = 104,993,980,777.44/276,640.80
  6. Step 6: Final answer
    x = 379,531.80

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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.