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Finding the Fourth Proportional to 627.04, 865.67 and 378.46

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Solution

The fourth proportional to 627.04, 865.67 and 378.46 is: 522.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.04 : 865.67 = 378.46 : x
  2. Step 2: Convert to fraction form
    627.04/865.67 = 378.46/x
  3. Step 3: Cross multiply
    627.04x = 865.67 × 378.46
  4. Step 4: Simplify right side
    627.04x = 327,621.47
  5. Step 5: Solve for x
    x = 327,621.47/627.04
  6. Step 6: Final answer
    x = 522.49

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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.