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Finding the Fourth Proportional to 349.16, 523.42 and 140.81

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Solution

The fourth proportional to 349.16, 523.42 and 140.81 is: 211.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.16 : 523.42 = 140.81 : x
  2. Step 2: Convert to fraction form
    349.16/523.42 = 140.81/x
  3. Step 3: Cross multiply
    349.16x = 523.42 × 140.81
  4. Step 4: Simplify right side
    349.16x = 73,701.46
  5. Step 5: Solve for x
    x = 73,701.46/349.16
  6. Step 6: Final answer
    x = 211.08

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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.