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Finding the Fourth Proportional to 628.35, 866.99 and 379.62

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Solution

The fourth proportional to 628.35, 866.99 and 379.62 is: 523.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.35 : 866.99 = 379.62 : x
  2. Step 2: Convert to fraction form
    628.35/866.99 = 379.62/x
  3. Step 3: Cross multiply
    628.35x = 866.99 × 379.62
  4. Step 4: Simplify right side
    628.35x = 329,126.63
  5. Step 5: Solve for x
    x = 329,126.63/628.35
  6. Step 6: Final answer
    x = 523.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.