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Finding the Fourth Proportional to 1,033.73, 1,424.97 and 812.30

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Solution

The fourth proportional to 1,033.73, 1,424.97 and 812.30 is: 1,119.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.73 : 1,424.97 = 812.30 : x
  2. Step 2: Convert to fraction form
    1,033.73/1,424.97 = 812.30/x
  3. Step 3: Cross multiply
    1,033.73x = 1,424.97 × 812.30
  4. Step 4: Simplify right side
    1,033.73x = 1,157,496.01
  5. Step 5: Solve for x
    x = 1,157,496.01/1,033.73
  6. Step 6: Final answer
    x = 1,119.73

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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.