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Finding the Fourth Proportional to 793.02, 1,189.89 and 408.54

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Solution

The fourth proportional to 793.02, 1,189.89 and 408.54 is: 613.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.02 : 1,189.89 = 408.54 : x
  2. Step 2: Convert to fraction form
    793.02/1,189.89 = 408.54/x
  3. Step 3: Cross multiply
    793.02x = 1,189.89 × 408.54
  4. Step 4: Simplify right side
    793.02x = 486,117.66
  5. Step 5: Solve for x
    x = 486,117.66/793.02
  6. Step 6: Final answer
    x = 613.00

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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.