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Finding the Fourth Proportional to 792.08, 1,187.28 and 380.96

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Solution

The fourth proportional to 792.08, 1,187.28 and 380.96 is: 571.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.08 : 1,187.28 = 380.96 : x
  2. Step 2: Convert to fraction form
    792.08/1,187.28 = 380.96/x
  3. Step 3: Cross multiply
    792.08x = 1,187.28 × 380.96
  4. Step 4: Simplify right side
    792.08x = 452,306.19
  5. Step 5: Solve for x
    x = 452,306.19/792.08
  6. Step 6: Final answer
    x = 571.04

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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.