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Finding the Fourth Proportional to 626.91, 939.33 and 382.92

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Solution

The fourth proportional to 626.91, 939.33 and 382.92 is: 573.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.91 : 939.33 = 382.92 : x
  2. Step 2: Convert to fraction form
    626.91/939.33 = 382.92/x
  3. Step 3: Cross multiply
    626.91x = 939.33 × 382.92
  4. Step 4: Simplify right side
    626.91x = 359,688.24
  5. Step 5: Solve for x
    x = 359,688.24/626.91
  6. Step 6: Final answer
    x = 573.75

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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.