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Finding the Third Proportional to 645.38 and 957.94

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Solution

The third proportional to 645.38 and 957.94 is: 1,421.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.38 : 957.94 = 957.94 : x
  2. Step 2: Convert to fraction form
    645.38/957.94 = 957.94/x
  3. Step 3: Cross multiply
    645.38x = 957.94 × 957.94
  4. Step 4: Simplify right side
    645.38x = 917,644.25
  5. Step 5: Solve for x
    x = 917,644.25/645.38
  6. Step 6: Final answer
    x = 1,421.88

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.