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Finding the Third Proportional to 208,280 and 431,329

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Solution

The third proportional to 208,280 and 431,329 is: 893,243.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,280 : 431,329 = 431,329 : x
  2. Step 2: Convert to fraction form
    208,280/431,329 = 431,329/x
  3. Step 3: Cross multiply
    208,280x = 431,329 × 431,329
  4. Step 4: Simplify right side
    208,280x = 186,044,706,241
  5. Step 5: Solve for x
    x = 186,044,706,241/208,280
  6. Step 6: Final answer
    x = 893,243.26

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.