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Finding the Fourth Proportional to 627.15, 866.29 and 481.58

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Solution

The fourth proportional to 627.15, 866.29 and 481.58 is: 665.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.15 : 866.29 = 481.58 : x
  2. Step 2: Convert to fraction form
    627.15/866.29 = 481.58/x
  3. Step 3: Cross multiply
    627.15x = 866.29 × 481.58
  4. Step 4: Simplify right side
    627.15x = 417,187.94
  5. Step 5: Solve for x
    x = 417,187.94/627.15
  6. Step 6: Final answer
    x = 665.21

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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.