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Finding the Fourth Proportional to 348.97, 523.30 and 105.45

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Solution

The fourth proportional to 348.97, 523.30 and 105.45 is: 158.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.97 : 523.30 = 105.45 : x
  2. Step 2: Convert to fraction form
    348.97/523.30 = 105.45/x
  3. Step 3: Cross multiply
    348.97x = 523.30 × 105.45
  4. Step 4: Simplify right side
    348.97x = 55,181.99
  5. Step 5: Solve for x
    x = 55,181.99/348.97
  6. Step 6: Final answer
    x = 158.13

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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.