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Finding the Fourth Proportional to 638,451.75, 957,469.24 and 211,872.98

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Solution

The fourth proportional to 638,451.75, 957,469.24 and 211,872.98 is: 317,740.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,451.75 : 957,469.24 = 211,872.98 : x
  2. Step 2: Convert to fraction form
    638,451.75/957,469.24 = 211,872.98/x
  3. Step 3: Cross multiply
    638,451.75x = 957,469.24 × 211,872.98
  4. Step 4: Simplify right side
    638,451.75x = 202,861,863,795.65
  5. Step 5: Solve for x
    x = 202,861,863,795.65/638,451.75
  6. Step 6: Final answer
    x = 317,740.32

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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.