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Finding the Fourth Proportional to 239.02, 330.01 and 208.31

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Solution

The fourth proportional to 239.02, 330.01 and 208.31 is: 287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.02 : 330.01 = 208.31 : x
  2. Step 2: Convert to fraction form
    239.02/330.01 = 208.31/x
  3. Step 3: Cross multiply
    239.02x = 330.01 × 208.31
  4. Step 4: Simplify right side
    239.02x = 68,742.21
  5. Step 5: Solve for x
    x = 68,742.21/239.02
  6. Step 6: Final answer
    x = 287.60

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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.