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Finding the Fourth Proportional to 349.05, 523.16 and 143.36

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Solution

The fourth proportional to 349.05, 523.16 and 143.36 is: 214.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.05 : 523.16 = 143.36 : x
  2. Step 2: Convert to fraction form
    349.05/523.16 = 143.36/x
  3. Step 3: Cross multiply
    349.05x = 523.16 × 143.36
  4. Step 4: Simplify right side
    349.05x = 75,001.46
  5. Step 5: Solve for x
    x = 75,001.46/349.05
  6. Step 6: Final answer
    x = 214.88

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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.