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Finding the Fourth Proportional to 348.50, 522.75 and 120.50

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Solution

The fourth proportional to 348.50, 522.75 and 120.50 is: 180.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.50 : 522.75 = 120.50 : x
  2. Step 2: Convert to fraction form
    348.50/522.75 = 120.50/x
  3. Step 3: Cross multiply
    348.50x = 522.75 × 120.50
  4. Step 4: Simplify right side
    348.50x = 62,991.38
  5. Step 5: Solve for x
    x = 62,991.38/348.50
  6. Step 6: Final answer
    x = 180.75

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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.