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Finding the Fourth Proportional to 776, 1,163.22 and 288.68

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Solution

The fourth proportional to 776, 1,163.22 and 288.68 is: 432.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    776 : 1,163.22 = 288.68 : x
  2. Step 2: Convert to fraction form
    776/1,163.22 = 288.68/x
  3. Step 3: Cross multiply
    776x = 1,163.22 × 288.68
  4. Step 4: Simplify right side
    776x = 335,798.35
  5. Step 5: Solve for x
    x = 335,798.35/776
  6. Step 6: Final answer
    x = 432.73

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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.