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Finding the Fourth Proportional to 1,792.92, 2,687.20 and 764.76

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Solution

The fourth proportional to 1,792.92, 2,687.20 and 764.76 is: 1,146.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,792.92 : 2,687.20 = 764.76 : x
  2. Step 2: Convert to fraction form
    1,792.92/2,687.20 = 764.76/x
  3. Step 3: Cross multiply
    1,792.92x = 2,687.20 × 764.76
  4. Step 4: Simplify right side
    1,792.92x = 2,055,063.07
  5. Step 5: Solve for x
    x = 2,055,063.07/1,792.92
  6. Step 6: Final answer
    x = 1,146.21

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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.