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Finding the Third Proportional to 128,871 and 282,285

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Solution

The third proportional to 128,871 and 282,285 is: 618,330.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,871 : 282,285 = 282,285 : x
  2. Step 2: Convert to fraction form
    128,871/282,285 = 282,285/x
  3. Step 3: Cross multiply
    128,871x = 282,285 × 282,285
  4. Step 4: Simplify right side
    128,871x = 79,684,821,225
  5. Step 5: Solve for x
    x = 79,684,821,225/128,871
  6. Step 6: Final answer
    x = 618,330.12

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.