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Finding the Fourth Proportional to 253.26, 349.16 and 218.66

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Solution

The fourth proportional to 253.26, 349.16 and 218.66 is: 301.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.26 : 349.16 = 218.66 : x
  2. Step 2: Convert to fraction form
    253.26/349.16 = 218.66/x
  3. Step 3: Cross multiply
    253.26x = 349.16 × 218.66
  4. Step 4: Simplify right side
    253.26x = 76,347.33
  5. Step 5: Solve for x
    x = 76,347.33/253.26
  6. Step 6: Final answer
    x = 301.46

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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.