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Finding the Third Proportional to 415 and 978.25

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Solution

The third proportional to 415 and 978.25 is: 2,305.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    415 : 978.25 = 978.25 : x
  2. Step 2: Convert to fraction form
    415/978.25 = 978.25/x
  3. Step 3: Cross multiply
    415x = 978.25 × 978.25
  4. Step 4: Simplify right side
    415x = 956,973.06
  5. Step 5: Solve for x
    x = 956,973.06/415
  6. Step 6: Final answer
    x = 2,305.96

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.