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Finding the Fourth Proportional to 629.55, 863.01 and 625.32

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Solution

The fourth proportional to 629.55, 863.01 and 625.32 is: 857.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.55 : 863.01 = 625.32 : x
  2. Step 2: Convert to fraction form
    629.55/863.01 = 625.32/x
  3. Step 3: Cross multiply
    629.55x = 863.01 × 625.32
  4. Step 4: Simplify right side
    629.55x = 539,657.41
  5. Step 5: Solve for x
    x = 539,657.41/629.55
  6. Step 6: Final answer
    x = 857.21

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.