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Finding the Fourth Proportional to 792.81, 1,189.71 and 359.97

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Solution

The fourth proportional to 792.81, 1,189.71 and 359.97 is: 540.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.81 : 1,189.71 = 359.97 : x
  2. Step 2: Convert to fraction form
    792.81/1,189.71 = 359.97/x
  3. Step 3: Cross multiply
    792.81x = 1,189.71 × 359.97
  4. Step 4: Simplify right side
    792.81x = 428,259.91
  5. Step 5: Solve for x
    x = 428,259.91/792.81
  6. Step 6: Final answer
    x = 540.18

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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.