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Finding the Fourth Proportional to 628.68, 943.34 and 381.93

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Solution

The fourth proportional to 628.68, 943.34 and 381.93 is: 573.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.68 : 943.34 = 381.93 : x
  2. Step 2: Convert to fraction form
    628.68/943.34 = 381.93/x
  3. Step 3: Cross multiply
    628.68x = 943.34 × 381.93
  4. Step 4: Simplify right side
    628.68x = 360,287.94
  5. Step 5: Solve for x
    x = 360,287.94/628.68
  6. Step 6: Final answer
    x = 573.09

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.