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Finding the Fourth Proportional to 253.56, 382.07 and 208.91

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Solution

The fourth proportional to 253.56, 382.07 and 208.91 is: 314.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.56 : 382.07 = 208.91 : x
  2. Step 2: Convert to fraction form
    253.56/382.07 = 208.91/x
  3. Step 3: Cross multiply
    253.56x = 382.07 × 208.91
  4. Step 4: Simplify right side
    253.56x = 79,815.29
  5. Step 5: Solve for x
    x = 79,815.29/253.56
  6. Step 6: Final answer
    x = 314.78

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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.