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Finding the Third Proportional to 128,549 and 266,818

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Solution

The third proportional to 128,549 and 266,818 is: 553,810.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,549 : 266,818 = 266,818 : x
  2. Step 2: Convert to fraction form
    128,549/266,818 = 266,818/x
  3. Step 3: Cross multiply
    128,549x = 266,818 × 266,818
  4. Step 4: Simplify right side
    128,549x = 71,191,845,124
  5. Step 5: Solve for x
    x = 71,191,845,124/128,549
  6. Step 6: Final answer
    x = 553,810.96

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.