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Finding the Fourth Proportional to 349.16, 523.78 and 105.70

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Solution

The fourth proportional to 349.16, 523.78 and 105.70 is: 158.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.16 : 523.78 = 105.70 : x
  2. Step 2: Convert to fraction form
    349.16/523.78 = 105.70/x
  3. Step 3: Cross multiply
    349.16x = 523.78 × 105.70
  4. Step 4: Simplify right side
    349.16x = 55,363.55
  5. Step 5: Solve for x
    x = 55,363.55/349.16
  6. Step 6: Final answer
    x = 158.56

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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.