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Finding the Third Proportional to 128,704 and 272,944

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Solution

The third proportional to 128,704 and 272,944 is: 578,835.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,704 : 272,944 = 272,944 : x
  2. Step 2: Convert to fraction form
    128,704/272,944 = 272,944/x
  3. Step 3: Cross multiply
    128,704x = 272,944 × 272,944
  4. Step 4: Simplify right side
    128,704x = 74,498,427,136
  5. Step 5: Solve for x
    x = 74,498,427,136/128,704
  6. Step 6: Final answer
    x = 578,835.37

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.