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Finding the Fourth Proportional to 258.11, 357.72 and 253.25

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Solution

The fourth proportional to 258.11, 357.72 and 253.25 is: 350.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.11 : 357.72 = 253.25 : x
  2. Step 2: Convert to fraction form
    258.11/357.72 = 253.25/x
  3. Step 3: Cross multiply
    258.11x = 357.72 × 253.25
  4. Step 4: Simplify right side
    258.11x = 90,592.62
  5. Step 5: Solve for x
    x = 90,592.62/258.11
  6. Step 6: Final answer
    x = 350.99

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.