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Finding the Fourth Proportional to 348.11, 521.36 and 266.30

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Solution

The fourth proportional to 348.11, 521.36 and 266.30 is: 398.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.11 : 521.36 = 266.30 : x
  2. Step 2: Convert to fraction form
    348.11/521.36 = 266.30/x
  3. Step 3: Cross multiply
    348.11x = 521.36 × 266.30
  4. Step 4: Simplify right side
    348.11x = 138,836.84
  5. Step 5: Solve for x
    x = 138,836.84/348.11
  6. Step 6: Final answer
    x = 398.83

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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.