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Finding the Fourth Proportional to 794.22, 1,190.47 and 331.87

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Solution

The fourth proportional to 794.22, 1,190.47 and 331.87 is: 497.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.22 : 1,190.47 = 331.87 : x
  2. Step 2: Convert to fraction form
    794.22/1,190.47 = 331.87/x
  3. Step 3: Cross multiply
    794.22x = 1,190.47 × 331.87
  4. Step 4: Simplify right side
    794.22x = 395,081.28
  5. Step 5: Solve for x
    x = 395,081.28/794.22
  6. Step 6: Final answer
    x = 497.45

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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.