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Finding the Fourth Proportional to 792.06, 1,187.40 and 271.86

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Solution

The fourth proportional to 792.06, 1,187.40 and 271.86 is: 407.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.06 : 1,187.40 = 271.86 : x
  2. Step 2: Convert to fraction form
    792.06/1,187.40 = 271.86/x
  3. Step 3: Cross multiply
    792.06x = 1,187.40 × 271.86
  4. Step 4: Simplify right side
    792.06x = 322,806.56
  5. Step 5: Solve for x
    x = 322,806.56/792.06
  6. Step 6: Final answer
    x = 407.55

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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.