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Finding the Third Proportional to 637,878 and 987,687

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Solution

The third proportional to 637,878 and 987,687 is: 1,529,329.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,878 : 987,687 = 987,687 : x
  2. Step 2: Convert to fraction form
    637,878/987,687 = 987,687/x
  3. Step 3: Cross multiply
    637,878x = 987,687 × 987,687
  4. Step 4: Simplify right side
    637,878x = 975,525,609,969
  5. Step 5: Solve for x
    x = 975,525,609,969/637,878
  6. Step 6: Final answer
    x = 1,529,329.45

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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.