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Finding the Third Proportional to 417.38 and 614.63

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Solution

The third proportional to 417.38 and 614.63 is: 905.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.38 : 614.63 = 614.63 : x
  2. Step 2: Convert to fraction form
    417.38/614.63 = 614.63/x
  3. Step 3: Cross multiply
    417.38x = 614.63 × 614.63
  4. Step 4: Simplify right side
    417.38x = 377,763.89
  5. Step 5: Solve for x
    x = 377,763.89/417.38
  6. Step 6: Final answer
    x = 905.09

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.