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Finding the Fourth Proportional to 348.72, 523.16 and 105.25

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Solution

The fourth proportional to 348.72, 523.16 and 105.25 is: 157.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.72 : 523.16 = 105.25 : x
  2. Step 2: Convert to fraction form
    348.72/523.16 = 105.25/x
  3. Step 3: Cross multiply
    348.72x = 523.16 × 105.25
  4. Step 4: Simplify right side
    348.72x = 55,062.59
  5. Step 5: Solve for x
    x = 55,062.59/348.72
  6. Step 6: Final answer
    x = 157.90

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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.