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Finding the Third Proportional to 138,528 and 299,209

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Solution

The third proportional to 138,528 and 299,209 is: 646,266.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,528 : 299,209 = 299,209 : x
  2. Step 2: Convert to fraction form
    138,528/299,209 = 299,209/x
  3. Step 3: Cross multiply
    138,528x = 299,209 × 299,209
  4. Step 4: Simplify right side
    138,528x = 89,526,025,681
  5. Step 5: Solve for x
    x = 89,526,025,681/138,528
  6. Step 6: Final answer
    x = 646,266.64

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.