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Finding the Fourth Proportional to 801.45, 1,203.09 and 748.60

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Solution

The fourth proportional to 801.45, 1,203.09 and 748.60 is: 1,123.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.45 : 1,203.09 = 748.60 : x
  2. Step 2: Convert to fraction form
    801.45/1,203.09 = 748.60/x
  3. Step 3: Cross multiply
    801.45x = 1,203.09 × 748.60
  4. Step 4: Simplify right side
    801.45x = 900,633.17
  5. Step 5: Solve for x
    x = 900,633.17/801.45
  6. Step 6: Final answer
    x = 1,123.75

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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.