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Finding the Fourth Proportional to 792.79, 1,188.95 and 272.70

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Solution

The fourth proportional to 792.79, 1,188.95 and 272.70 is: 408.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.79 : 1,188.95 = 272.70 : x
  2. Step 2: Convert to fraction form
    792.79/1,188.95 = 272.70/x
  3. Step 3: Cross multiply
    792.79x = 1,188.95 × 272.70
  4. Step 4: Simplify right side
    792.79x = 324,225.30
  5. Step 5: Solve for x
    x = 324,225.30/792.79
  6. Step 6: Final answer
    x = 408.97

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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.