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Finding the Fourth Proportional to 268.14, 369.63 and 209.82

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Solution

The fourth proportional to 268.14, 369.63 and 209.82 is: 289.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.14 : 369.63 = 209.82 : x
  2. Step 2: Convert to fraction form
    268.14/369.63 = 209.82/x
  3. Step 3: Cross multiply
    268.14x = 369.63 × 209.82
  4. Step 4: Simplify right side
    268.14x = 77,555.77
  5. Step 5: Solve for x
    x = 77,555.77/268.14
  6. Step 6: Final answer
    x = 289.24

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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.