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Finding the Fourth Proportional to 268.27, 370.36 and 209.39

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Solution

The fourth proportional to 268.27, 370.36 and 209.39 is: 289.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.27 : 370.36 = 209.39 : x
  2. Step 2: Convert to fraction form
    268.27/370.36 = 209.39/x
  3. Step 3: Cross multiply
    268.27x = 370.36 × 209.39
  4. Step 4: Simplify right side
    268.27x = 77,550.76
  5. Step 5: Solve for x
    x = 77,550.76/268.27
  6. Step 6: Final answer
    x = 289.08

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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.