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Finding the Fourth Proportional to 628.41, 943.13 and 443.69

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Solution

The fourth proportional to 628.41, 943.13 and 443.69 is: 665.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.41 : 943.13 = 443.69 : x
  2. Step 2: Convert to fraction form
    628.41/943.13 = 443.69/x
  3. Step 3: Cross multiply
    628.41x = 943.13 × 443.69
  4. Step 4: Simplify right side
    628.41x = 418,457.28
  5. Step 5: Solve for x
    x = 418,457.28/628.41
  6. Step 6: Final answer
    x = 665.89

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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.