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Finding the Fourth Proportional to 628.71, 943.25 and 382.11

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Solution

The fourth proportional to 628.71, 943.25 and 382.11 is: 573.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.71 : 943.25 = 382.11 : x
  2. Step 2: Convert to fraction form
    628.71/943.25 = 382.11/x
  3. Step 3: Cross multiply
    628.71x = 943.25 × 382.11
  4. Step 4: Simplify right side
    628.71x = 360,423.35
  5. Step 5: Solve for x
    x = 360,423.35/628.71
  6. Step 6: Final answer
    x = 573.27

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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.