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Finding the Third Proportional to 178,278 and 388,536

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Solution

The third proportional to 178,278 and 388,536 is: 846,768.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,278 : 388,536 = 388,536 : x
  2. Step 2: Convert to fraction form
    178,278/388,536 = 388,536/x
  3. Step 3: Cross multiply
    178,278x = 388,536 × 388,536
  4. Step 4: Simplify right side
    178,278x = 150,960,223,296
  5. Step 5: Solve for x
    x = 150,960,223,296/178,278
  6. Step 6: Final answer
    x = 846,768.66

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.