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Finding the Fourth Proportional to 300,208.85, 449,219.78 and 221,476.85

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Solution

The fourth proportional to 300,208.85, 449,219.78 and 221,476.85 is: 331,408.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,208.85 : 449,219.78 = 221,476.85 : x
  2. Step 2: Convert to fraction form
    300,208.85/449,219.78 = 221,476.85/x
  3. Step 3: Cross multiply
    300,208.85x = 449,219.78 × 221,476.85
  4. Step 4: Simplify right side
    300,208.85x = 99,491,780,724.71
  5. Step 5: Solve for x
    x = 99,491,780,724.71/300,208.85
  6. Step 6: Final answer
    x = 331,408.55

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1.5x scale

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.