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Finding the Fourth Proportional to 773.34, 1,160.21 and 286.53

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Solution

The fourth proportional to 773.34, 1,160.21 and 286.53 is: 429.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.34 : 1,160.21 = 286.53 : x
  2. Step 2: Convert to fraction form
    773.34/1,160.21 = 286.53/x
  3. Step 3: Cross multiply
    773.34x = 1,160.21 × 286.53
  4. Step 4: Simplify right side
    773.34x = 332,434.97
  5. Step 5: Solve for x
    x = 332,434.97/773.34
  6. Step 6: Final answer
    x = 429.87

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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.