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Finding the Fourth Proportional to 253.06, 381.31 and 208.41

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Solution

The fourth proportional to 253.06, 381.31 and 208.41 is: 314.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.06 : 381.31 = 208.41 : x
  2. Step 2: Convert to fraction form
    253.06/381.31 = 208.41/x
  3. Step 3: Cross multiply
    253.06x = 381.31 × 208.41
  4. Step 4: Simplify right side
    253.06x = 79,468.82
  5. Step 5: Solve for x
    x = 79,468.82/253.06
  6. Step 6: Final answer
    x = 314.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.