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Finding the Fourth Proportional to 283.56, 391.54 and 261.72

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Solution

The fourth proportional to 283.56, 391.54 and 261.72 is: 361.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.56 : 391.54 = 261.72 : x
  2. Step 2: Convert to fraction form
    283.56/391.54 = 261.72/x
  3. Step 3: Cross multiply
    283.56x = 391.54 × 261.72
  4. Step 4: Simplify right side
    283.56x = 102,473.85
  5. Step 5: Solve for x
    x = 102,473.85/283.56
  6. Step 6: Final answer
    x = 361.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.