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Finding the Fourth Proportional to 773.62, 1,161.03 and 286.81

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Solution

The fourth proportional to 773.62, 1,161.03 and 286.81 is: 430.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.62 : 1,161.03 = 286.81 : x
  2. Step 2: Convert to fraction form
    773.62/1,161.03 = 286.81/x
  3. Step 3: Cross multiply
    773.62x = 1,161.03 × 286.81
  4. Step 4: Simplify right side
    773.62x = 332,989.21
  5. Step 5: Solve for x
    x = 332,989.21/773.62
  6. Step 6: Final answer
    x = 430.43

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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.