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Finding the Fourth Proportional to 668.36, 997.70 and 620.28

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Solution

The fourth proportional to 668.36, 997.70 and 620.28 is: 925.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.36 : 997.70 = 620.28 : x
  2. Step 2: Convert to fraction form
    668.36/997.70 = 620.28/x
  3. Step 3: Cross multiply
    668.36x = 997.70 × 620.28
  4. Step 4: Simplify right side
    668.36x = 618,850.25
  5. Step 5: Solve for x
    x = 618,850.25/668.36
  6. Step 6: Final answer
    x = 925.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.