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Finding the Third Proportional to 388,741 and 634,780

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Solution

The third proportional to 388,741 and 634,780 is: 1,036,540.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,741 : 634,780 = 634,780 : x
  2. Step 2: Convert to fraction form
    388,741/634,780 = 634,780/x
  3. Step 3: Cross multiply
    388,741x = 634,780 × 634,780
  4. Step 4: Simplify right side
    388,741x = 402,945,648,400
  5. Step 5: Solve for x
    x = 402,945,648,400/388,741
  6. Step 6: Final answer
    x = 1,036,540.13

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.