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Finding the Third Proportional to 874.75 and 1,284

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Solution

The third proportional to 874.75 and 1,284 is: 1,884.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.75 : 1,284 = 1,284 : x
  2. Step 2: Convert to fraction form
    874.75/1,284 = 1,284/x
  3. Step 3: Cross multiply
    874.75x = 1,284 × 1,284
  4. Step 4: Simplify right side
    874.75x = 1,648,656
  5. Step 5: Solve for x
    x = 1,648,656/874.75
  6. Step 6: Final answer
    x = 1,884.72

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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.