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Finding the Fourth Proportional to 626.05, 938.40 and 382.74

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Solution

The fourth proportional to 626.05, 938.40 and 382.74 is: 573.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.05 : 938.40 = 382.74 : x
  2. Step 2: Convert to fraction form
    626.05/938.40 = 382.74/x
  3. Step 3: Cross multiply
    626.05x = 938.40 × 382.74
  4. Step 4: Simplify right side
    626.05x = 359,163.22
  5. Step 5: Solve for x
    x = 359,163.22/626.05
  6. Step 6: Final answer
    x = 573.70

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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.