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Finding the Fourth Proportional to 319.33, 440.88 and 208.99

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Solution

The fourth proportional to 319.33, 440.88 and 208.99 is: 288.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.33 : 440.88 = 208.99 : x
  2. Step 2: Convert to fraction form
    319.33/440.88 = 208.99/x
  3. Step 3: Cross multiply
    319.33x = 440.88 × 208.99
  4. Step 4: Simplify right side
    319.33x = 92,139.28
  5. Step 5: Solve for x
    x = 92,139.28/319.33
  6. Step 6: Final answer
    x = 288.54

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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.