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Finding the Fourth Proportional to 235.91, 352.23 and 207.20

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Solution

The fourth proportional to 235.91, 352.23 and 207.20 is: 309.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.91 : 352.23 = 207.20 : x
  2. Step 2: Convert to fraction form
    235.91/352.23 = 207.20/x
  3. Step 3: Cross multiply
    235.91x = 352.23 × 207.20
  4. Step 4: Simplify right side
    235.91x = 72,982.06
  5. Step 5: Solve for x
    x = 72,982.06/235.91
  6. Step 6: Final answer
    x = 309.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.