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Finding the Fourth Proportional to 793.45, 1,190.18 and 306.30

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Solution

The fourth proportional to 793.45, 1,190.18 and 306.30 is: 459.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.45 : 1,190.18 = 306.30 : x
  2. Step 2: Convert to fraction form
    793.45/1,190.18 = 306.30/x
  3. Step 3: Cross multiply
    793.45x = 1,190.18 × 306.30
  4. Step 4: Simplify right side
    793.45x = 364,552.13
  5. Step 5: Solve for x
    x = 364,552.13/793.45
  6. Step 6: Final answer
    x = 459.45

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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.