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Finding the Fourth Proportional to 319.17, 440.54 and 208.95

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Solution

The fourth proportional to 319.17, 440.54 and 208.95 is: 288.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.17 : 440.54 = 208.95 : x
  2. Step 2: Convert to fraction form
    319.17/440.54 = 208.95/x
  3. Step 3: Cross multiply
    319.17x = 440.54 × 208.95
  4. Step 4: Simplify right side
    319.17x = 92,050.83
  5. Step 5: Solve for x
    x = 92,050.83/319.17
  6. Step 6: Final answer
    x = 288.41

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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.