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Finding the Fourth Proportional to 793.64, 1,188.86 and 748.68

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Solution

The fourth proportional to 793.64, 1,188.86 and 748.68 is: 1,121.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.64 : 1,188.86 = 748.68 : x
  2. Step 2: Convert to fraction form
    793.64/1,188.86 = 748.68/x
  3. Step 3: Cross multiply
    793.64x = 1,188.86 × 748.68
  4. Step 4: Simplify right side
    793.64x = 890,075.70
  5. Step 5: Solve for x
    x = 890,075.70/793.64
  6. Step 6: Final answer
    x = 1,121.51

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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.