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Finding the Fourth Proportional to 240.21, 355.41 and 239.49

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Solution

The fourth proportional to 240.21, 355.41 and 239.49 is: 354.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.21 : 355.41 = 239.49 : x
  2. Step 2: Convert to fraction form
    240.21/355.41 = 239.49/x
  3. Step 3: Cross multiply
    240.21x = 355.41 × 239.49
  4. Step 4: Simplify right side
    240.21x = 85,117.14
  5. Step 5: Solve for x
    x = 85,117.14/240.21
  6. Step 6: Final answer
    x = 354.34

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.