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Finding the Third Proportional to 491 and 706.25

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Solution

The third proportional to 491 and 706.25 is: 1,015.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    491 : 706.25 = 706.25 : x
  2. Step 2: Convert to fraction form
    491/706.25 = 706.25/x
  3. Step 3: Cross multiply
    491x = 706.25 × 706.25
  4. Step 4: Simplify right side
    491x = 498,789.06
  5. Step 5: Solve for x
    x = 498,789.06/491
  6. Step 6: Final answer
    x = 1,015.86

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.