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Finding the Fourth Proportional to 263.98, 364.56 and 209.12

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Solution

The fourth proportional to 263.98, 364.56 and 209.12 is: 288.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.98 : 364.56 = 209.12 : x
  2. Step 2: Convert to fraction form
    263.98/364.56 = 209.12/x
  3. Step 3: Cross multiply
    263.98x = 364.56 × 209.12
  4. Step 4: Simplify right side
    263.98x = 76,236.79
  5. Step 5: Solve for x
    x = 76,236.79/263.98
  6. Step 6: Final answer
    x = 288.80

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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.