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Finding the Fourth Proportional to 628.29, 866.76 and 379.53

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Solution

The fourth proportional to 628.29, 866.76 and 379.53 is: 523.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.29 : 866.76 = 379.53 : x
  2. Step 2: Convert to fraction form
    628.29/866.76 = 379.53/x
  3. Step 3: Cross multiply
    628.29x = 866.76 × 379.53
  4. Step 4: Simplify right side
    628.29x = 328,961.42
  5. Step 5: Solve for x
    x = 328,961.42/628.29
  6. Step 6: Final answer
    x = 523.58

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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.