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Finding the Fourth Proportional to 253.98, 350.20 and 187.69

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Solution

The fourth proportional to 253.98, 350.20 and 187.69 is: 258.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.98 : 350.20 = 187.69 : x
  2. Step 2: Convert to fraction form
    253.98/350.20 = 187.69/x
  3. Step 3: Cross multiply
    253.98x = 350.20 × 187.69
  4. Step 4: Simplify right side
    253.98x = 65,726.82
  5. Step 5: Solve for x
    x = 65,726.82/253.98
  6. Step 6: Final answer
    x = 258.79

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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.