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Finding the Third Proportional to 399.94 and 609.08

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Solution

The third proportional to 399.94 and 609.08 is: 927.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.94 : 609.08 = 609.08 : x
  2. Step 2: Convert to fraction form
    399.94/609.08 = 609.08/x
  3. Step 3: Cross multiply
    399.94x = 609.08 × 609.08
  4. Step 4: Simplify right side
    399.94x = 370,980.92
  5. Step 5: Solve for x
    x = 370,980.92/399.94
  6. Step 6: Final answer
    x = 927.60

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.