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Finding the Fourth Proportional to 253.09, 349.12 and 159.81

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Solution

The fourth proportional to 253.09, 349.12 and 159.81 is: 220.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.09 : 349.12 = 159.81 : x
  2. Step 2: Convert to fraction form
    253.09/349.12 = 159.81/x
  3. Step 3: Cross multiply
    253.09x = 349.12 × 159.81
  4. Step 4: Simplify right side
    253.09x = 55,791.76
  5. Step 5: Solve for x
    x = 55,791.76/253.09
  6. Step 6: Final answer
    x = 220.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.