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Finding the Fourth Proportional to 625.80, 939.52 and 394.06

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Solution

The fourth proportional to 625.80, 939.52 and 394.06 is: 591.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.80 : 939.52 = 394.06 : x
  2. Step 2: Convert to fraction form
    625.80/939.52 = 394.06/x
  3. Step 3: Cross multiply
    625.80x = 939.52 × 394.06
  4. Step 4: Simplify right side
    625.80x = 370,227.25
  5. Step 5: Solve for x
    x = 370,227.25/625.80
  6. Step 6: Final answer
    x = 591.61

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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.