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Finding the Fourth Proportional to 239.22, 358.43 and 208.44

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Solution

The fourth proportional to 239.22, 358.43 and 208.44 is: 312.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.22 : 358.43 = 208.44 : x
  2. Step 2: Convert to fraction form
    239.22/358.43 = 208.44/x
  3. Step 3: Cross multiply
    239.22x = 358.43 × 208.44
  4. Step 4: Simplify right side
    239.22x = 74,710.11
  5. Step 5: Solve for x
    x = 74,710.11/239.22
  6. Step 6: Final answer
    x = 312.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.