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Finding the Fourth Proportional to 748.30, 1,122.48 and 626.20

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Solution

The fourth proportional to 748.30, 1,122.48 and 626.20 is: 939.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.30 : 1,122.48 = 626.20 : x
  2. Step 2: Convert to fraction form
    748.30/1,122.48 = 626.20/x
  3. Step 3: Cross multiply
    748.30x = 1,122.48 × 626.20
  4. Step 4: Simplify right side
    748.30x = 702,896.98
  5. Step 5: Solve for x
    x = 702,896.98/748.30
  6. Step 6: Final answer
    x = 939.33

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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.