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Finding the Fourth Proportional to 648.87, 894.97 and 627.45

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Solution

The fourth proportional to 648.87, 894.97 and 627.45 is: 865.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.87 : 894.97 = 627.45 : x
  2. Step 2: Convert to fraction form
    648.87/894.97 = 627.45/x
  3. Step 3: Cross multiply
    648.87x = 894.97 × 627.45
  4. Step 4: Simplify right side
    648.87x = 561,548.93
  5. Step 5: Solve for x
    x = 561,548.93/648.87
  6. Step 6: Final answer
    x = 865.43

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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.