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Finding the Fourth Proportional to 1,012.62, 1,396.10 and 872.22

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Solution

The fourth proportional to 1,012.62, 1,396.10 and 872.22 is: 1,202.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.62 : 1,396.10 = 872.22 : x
  2. Step 2: Convert to fraction form
    1,012.62/1,396.10 = 872.22/x
  3. Step 3: Cross multiply
    1,012.62x = 1,396.10 × 872.22
  4. Step 4: Simplify right side
    1,012.62x = 1,217,706.34
  5. Step 5: Solve for x
    x = 1,217,706.34/1,012.62
  6. Step 6: Final answer
    x = 1,202.53

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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.