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Finding the Fourth Proportional to 253.87, 381.01 and 144.25

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Solution

The fourth proportional to 253.87, 381.01 and 144.25 is: 216.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.87 : 381.01 = 144.25 : x
  2. Step 2: Convert to fraction form
    253.87/381.01 = 144.25/x
  3. Step 3: Cross multiply
    253.87x = 381.01 × 144.25
  4. Step 4: Simplify right side
    253.87x = 54,960.69
  5. Step 5: Solve for x
    x = 54,960.69/253.87
  6. Step 6: Final answer
    x = 216.49

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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.