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Finding the Fourth Proportional to 627.51, 865.83 and 394.50

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Solution

The fourth proportional to 627.51, 865.83 and 394.50 is: 544.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.51 : 865.83 = 394.50 : x
  2. Step 2: Convert to fraction form
    627.51/865.83 = 394.50/x
  3. Step 3: Cross multiply
    627.51x = 865.83 × 394.50
  4. Step 4: Simplify right side
    627.51x = 341,569.94
  5. Step 5: Solve for x
    x = 341,569.94/627.51
  6. Step 6: Final answer
    x = 544.33

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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.