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Finding the Fourth Proportional to 349.08, 523.16 and 143.40

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Solution

The fourth proportional to 349.08, 523.16 and 143.40 is: 214.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.08 : 523.16 = 143.40 : x
  2. Step 2: Convert to fraction form
    349.08/523.16 = 143.40/x
  3. Step 3: Cross multiply
    349.08x = 523.16 × 143.40
  4. Step 4: Simplify right side
    349.08x = 75,021.14
  5. Step 5: Solve for x
    x = 75,021.14/349.08
  6. Step 6: Final answer
    x = 214.91

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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.