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Finding the Fourth Proportional to 866.73, 1,300.79 and 764.22

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Solution

The fourth proportional to 866.73, 1,300.79 and 764.22 is: 1,146.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.73 : 1,300.79 = 764.22 : x
  2. Step 2: Convert to fraction form
    866.73/1,300.79 = 764.22/x
  3. Step 3: Cross multiply
    866.73x = 1,300.79 × 764.22
  4. Step 4: Simplify right side
    866.73x = 994,085.91
  5. Step 5: Solve for x
    x = 994,085.91/866.73
  6. Step 6: Final answer
    x = 1,146.94

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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.