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Finding the Fourth Proportional to 348.00, 521.32 and 261.44

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Solution

The fourth proportional to 348.00, 521.32 and 261.44 is: 391.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.00 : 521.32 = 261.44 : x
  2. Step 2: Convert to fraction form
    348.00/521.32 = 261.44/x
  3. Step 3: Cross multiply
    348.00x = 521.32 × 261.44
  4. Step 4: Simplify right side
    348.00x = 136,291.62
  5. Step 5: Solve for x
    x = 136,291.62/348.00
  6. Step 6: Final answer
    x = 391.64

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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.