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Finding the Fourth Proportional to 348.31, 522.21 and 165.49

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Solution

The fourth proportional to 348.31, 522.21 and 165.49 is: 248.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.31 : 522.21 = 165.49 : x
  2. Step 2: Convert to fraction form
    348.31/522.21 = 165.49/x
  3. Step 3: Cross multiply
    348.31x = 522.21 × 165.49
  4. Step 4: Simplify right side
    348.31x = 86,420.53
  5. Step 5: Solve for x
    x = 86,420.53/348.31
  6. Step 6: Final answer
    x = 248.11

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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.