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Finding the Fourth Proportional to 663.64, 997.25 and 625.88

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Solution

The fourth proportional to 663.64, 997.25 and 625.88 is: 940.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.64 : 997.25 = 625.88 : x
  2. Step 2: Convert to fraction form
    663.64/997.25 = 625.88/x
  3. Step 3: Cross multiply
    663.64x = 997.25 × 625.88
  4. Step 4: Simplify right side
    663.64x = 624,158.19
  5. Step 5: Solve for x
    x = 624,158.19/663.64
  6. Step 6: Final answer
    x = 940.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.