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Finding the Third Proportional to 417.19 and 648.94

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Solution

The third proportional to 417.19 and 648.94 is: 1,009.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.19 : 648.94 = 648.94 : x
  2. Step 2: Convert to fraction form
    417.19/648.94 = 648.94/x
  3. Step 3: Cross multiply
    417.19x = 648.94 × 648.94
  4. Step 4: Simplify right side
    417.19x = 421,119.88
  5. Step 5: Solve for x
    x = 421,119.88/417.19
  6. Step 6: Final answer
    x = 1,009.43

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.