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Finding the Fourth Proportional to 1,447.50, 2,174.17 and 863.65

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Solution

The fourth proportional to 1,447.50, 2,174.17 and 863.65 is: 1,297.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.50 : 2,174.17 = 863.65 : x
  2. Step 2: Convert to fraction form
    1,447.50/2,174.17 = 863.65/x
  3. Step 3: Cross multiply
    1,447.50x = 2,174.17 × 863.65
  4. Step 4: Simplify right side
    1,447.50x = 1,877,706.73
  5. Step 5: Solve for x
    x = 1,877,706.73/1,447.50
  6. Step 6: Final answer
    x = 1,297.21

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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.