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Finding the Third Proportional to 978.25 and 1,739.75

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Solution

The third proportional to 978.25 and 1,739.75 is: 3,094.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.25 : 1,739.75 = 1,739.75 : x
  2. Step 2: Convert to fraction form
    978.25/1,739.75 = 1,739.75/x
  3. Step 3: Cross multiply
    978.25x = 1,739.75 × 1,739.75
  4. Step 4: Simplify right side
    978.25x = 3,026,730.06
  5. Step 5: Solve for x
    x = 3,026,730.06/978.25
  6. Step 6: Final answer
    x = 3,094.03

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.