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Finding the Fourth Proportional to 253.80, 349.65 and 239.22

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Solution

The fourth proportional to 253.80, 349.65 and 239.22 is: 329.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.80 : 349.65 = 239.22 : x
  2. Step 2: Convert to fraction form
    253.80/349.65 = 239.22/x
  3. Step 3: Cross multiply
    253.80x = 349.65 × 239.22
  4. Step 4: Simplify right side
    253.80x = 83,643.27
  5. Step 5: Solve for x
    x = 83,643.27/253.80
  6. Step 6: Final answer
    x = 329.56

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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.