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Finding the Fourth Proportional to 792.22, 1,187.47 and 329.87

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Solution

The fourth proportional to 792.22, 1,187.47 and 329.87 is: 494.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.22 : 1,187.47 = 329.87 : x
  2. Step 2: Convert to fraction form
    792.22/1,187.47 = 329.87/x
  3. Step 3: Cross multiply
    792.22x = 1,187.47 × 329.87
  4. Step 4: Simplify right side
    792.22x = 391,714.57
  5. Step 5: Solve for x
    x = 391,714.57/792.22
  6. Step 6: Final answer
    x = 494.45

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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.