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Finding the Fourth Proportional to 348.09, 521.64 and 165.30

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Solution

The fourth proportional to 348.09, 521.64 and 165.30 is: 247.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.09 : 521.64 = 165.30 : x
  2. Step 2: Convert to fraction form
    348.09/521.64 = 165.30/x
  3. Step 3: Cross multiply
    348.09x = 521.64 × 165.30
  4. Step 4: Simplify right side
    348.09x = 86,227.09
  5. Step 5: Solve for x
    x = 86,227.09/348.09
  6. Step 6: Final answer
    x = 247.71

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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.