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Finding the Fourth Proportional to 253.82, 381 and 203.06

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Solution

The fourth proportional to 253.82, 381 and 203.06 is: 304.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.82 : 381 = 203.06 : x
  2. Step 2: Convert to fraction form
    253.82/381 = 203.06/x
  3. Step 3: Cross multiply
    253.82x = 381 × 203.06
  4. Step 4: Simplify right side
    253.82x = 77,365.86
  5. Step 5: Solve for x
    x = 77,365.86/253.82
  6. Step 6: Final answer
    x = 304.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.