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Finding the Fourth Proportional to 257.82, 356.09 and 235.64

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Solution

The fourth proportional to 257.82, 356.09 and 235.64 is: 325.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.82 : 356.09 = 235.64 : x
  2. Step 2: Convert to fraction form
    257.82/356.09 = 235.64/x
  3. Step 3: Cross multiply
    257.82x = 356.09 × 235.64
  4. Step 4: Simplify right side
    257.82x = 83,909.05
  5. Step 5: Solve for x
    x = 83,909.05/257.82
  6. Step 6: Final answer
    x = 325.46

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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.