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Finding the Third Proportional to 178,498 and 276,539

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Solution

The third proportional to 178,498 and 276,539 is: 428,429.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,498 : 276,539 = 276,539 : x
  2. Step 2: Convert to fraction form
    178,498/276,539 = 276,539/x
  3. Step 3: Cross multiply
    178,498x = 276,539 × 276,539
  4. Step 4: Simplify right side
    178,498x = 76,473,818,521
  5. Step 5: Solve for x
    x = 76,473,818,521/178,498
  6. Step 6: Final answer
    x = 428,429.55

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.