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Finding the Fourth Proportional to 775.84, 1,163.72 and 282.26

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Solution

The fourth proportional to 775.84, 1,163.72 and 282.26 is: 423.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.84 : 1,163.72 = 282.26 : x
  2. Step 2: Convert to fraction form
    775.84/1,163.72 = 282.26/x
  3. Step 3: Cross multiply
    775.84x = 1,163.72 × 282.26
  4. Step 4: Simplify right side
    775.84x = 328,471.61
  5. Step 5: Solve for x
    x = 328,471.61/775.84
  6. Step 6: Final answer
    x = 423.38

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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.