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Finding the Third Proportional to 621.94 and 984.38

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Solution

The third proportional to 621.94 and 984.38 is: 1,558.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.94 : 984.38 = 984.38 : x
  2. Step 2: Convert to fraction form
    621.94/984.38 = 984.38/x
  3. Step 3: Cross multiply
    621.94x = 984.38 × 984.38
  4. Step 4: Simplify right side
    621.94x = 968,994.14
  5. Step 5: Solve for x
    x = 968,994.14/621.94
  6. Step 6: Final answer
    x = 1,558.02

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.