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Finding the Third Proportional to 426.75 and 669.84

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Solution

The third proportional to 426.75 and 669.84 is: 1,051.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.75 : 669.84 = 669.84 : x
  2. Step 2: Convert to fraction form
    426.75/669.84 = 669.84/x
  3. Step 3: Cross multiply
    426.75x = 669.84 × 669.84
  4. Step 4: Simplify right side
    426.75x = 448,690.65
  5. Step 5: Solve for x
    x = 448,690.65/426.75
  6. Step 6: Final answer
    x = 1,051.41

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.