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Finding the Fourth Proportional to 627.05, 865.23 and 394.13

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Solution

The fourth proportional to 627.05, 865.23 and 394.13 is: 543.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.05 : 865.23 = 394.13 : x
  2. Step 2: Convert to fraction form
    627.05/865.23 = 394.13/x
  3. Step 3: Cross multiply
    627.05x = 865.23 × 394.13
  4. Step 4: Simplify right side
    627.05x = 341,008.77
  5. Step 5: Solve for x
    x = 341,008.77/627.05
  6. Step 6: Final answer
    x = 543.83

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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.