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Finding the Fourth Proportional to 263.99, 363.50 and 208.55

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Solution

The fourth proportional to 263.99, 363.50 and 208.55 is: 287.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.99 : 363.50 = 208.55 : x
  2. Step 2: Convert to fraction form
    263.99/363.50 = 208.55/x
  3. Step 3: Cross multiply
    263.99x = 363.50 × 208.55
  4. Step 4: Simplify right side
    263.99x = 75,806.63
  5. Step 5: Solve for x
    x = 75,806.63/263.99
  6. Step 6: Final answer
    x = 287.16

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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.