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Finding the Fourth Proportional to 627.48, 865.53 and 394.74

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Solution

The fourth proportional to 627.48, 865.53 and 394.74 is: 544.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.48 : 865.53 = 394.74 : x
  2. Step 2: Convert to fraction form
    627.48/865.53 = 394.74/x
  3. Step 3: Cross multiply
    627.48x = 865.53 × 394.74
  4. Step 4: Simplify right side
    627.48x = 341,659.31
  5. Step 5: Solve for x
    x = 341,659.31/627.48
  6. Step 6: Final answer
    x = 544.49

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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.