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Finding the Fourth Proportional to 627.77, 866.49 and 406.73

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Solution

The fourth proportional to 627.77, 866.49 and 406.73 is: 561.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.77 : 866.49 = 406.73 : x
  2. Step 2: Convert to fraction form
    627.77/866.49 = 406.73/x
  3. Step 3: Cross multiply
    627.77x = 866.49 × 406.73
  4. Step 4: Simplify right side
    627.77x = 352,427.48
  5. Step 5: Solve for x
    x = 352,427.48/627.77
  6. Step 6: Final answer
    x = 561.40

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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.