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Finding the Fourth Proportional to 253.05, 378.81 and 166.11

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Solution

The fourth proportional to 253.05, 378.81 and 166.11 is: 248.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.05 : 378.81 = 166.11 : x
  2. Step 2: Convert to fraction form
    253.05/378.81 = 166.11/x
  3. Step 3: Cross multiply
    253.05x = 378.81 × 166.11
  4. Step 4: Simplify right side
    253.05x = 62,924.13
  5. Step 5: Solve for x
    x = 62,924.13/253.05
  6. Step 6: Final answer
    x = 248.66

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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.