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Finding the Fourth Proportional to 240.02, 331.39 and 209.31

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Solution

The fourth proportional to 240.02, 331.39 and 209.31 is: 288.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.02 : 331.39 = 209.31 : x
  2. Step 2: Convert to fraction form
    240.02/331.39 = 209.31/x
  3. Step 3: Cross multiply
    240.02x = 331.39 × 209.31
  4. Step 4: Simplify right side
    240.02x = 69,363.24
  5. Step 5: Solve for x
    x = 69,363.24/240.02
  6. Step 6: Final answer
    x = 288.99

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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.