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Finding the Fourth Proportional to 382.36, 527.36 and 257.96

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Solution

The fourth proportional to 382.36, 527.36 and 257.96 is: 355.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.36 : 527.36 = 257.96 : x
  2. Step 2: Convert to fraction form
    382.36/527.36 = 257.96/x
  3. Step 3: Cross multiply
    382.36x = 527.36 × 257.96
  4. Step 4: Simplify right side
    382.36x = 136,037.79
  5. Step 5: Solve for x
    x = 136,037.79/382.36
  6. Step 6: Final answer
    x = 355.78

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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.