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Finding the Fourth Proportional to 349.30, 524.03 and 143.89

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Solution

The fourth proportional to 349.30, 524.03 and 143.89 is: 215.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.30 : 524.03 = 143.89 : x
  2. Step 2: Convert to fraction form
    349.30/524.03 = 143.89/x
  3. Step 3: Cross multiply
    349.30x = 524.03 × 143.89
  4. Step 4: Simplify right side
    349.30x = 75,402.68
  5. Step 5: Solve for x
    x = 75,402.68/349.30
  6. Step 6: Final answer
    x = 215.87

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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.