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Finding the Fourth Proportional to 792.05, 1,188.59 and 359.21

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Solution

The fourth proportional to 792.05, 1,188.59 and 359.21 is: 539.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.05 : 1,188.59 = 359.21 : x
  2. Step 2: Convert to fraction form
    792.05/1,188.59 = 359.21/x
  3. Step 3: Cross multiply
    792.05x = 1,188.59 × 359.21
  4. Step 4: Simplify right side
    792.05x = 426,945.67
  5. Step 5: Solve for x
    x = 426,945.67/792.05
  6. Step 6: Final answer
    x = 539.04

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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.