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Finding the Third Proportional to 874.50 and 1,320.09

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Solution

The third proportional to 874.50 and 1,320.09 is: 1,992.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.50 : 1,320.09 = 1,320.09 : x
  2. Step 2: Convert to fraction form
    874.50/1,320.09 = 1,320.09/x
  3. Step 3: Cross multiply
    874.50x = 1,320.09 × 1,320.09
  4. Step 4: Simplify right side
    874.50x = 1,742,647.51
  5. Step 5: Solve for x
    x = 1,742,647.51/874.50
  6. Step 6: Final answer
    x = 1,992.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.