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Finding the Third Proportional to 637,872 and 987,678

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Solution

The third proportional to 637,872 and 987,678 is: 1,529,315.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,872 : 987,678 = 987,678 : x
  2. Step 2: Convert to fraction form
    637,872/987,678 = 987,678/x
  3. Step 3: Cross multiply
    637,872x = 987,678 × 987,678
  4. Step 4: Simplify right side
    637,872x = 975,507,831,684
  5. Step 5: Solve for x
    x = 975,507,831,684/637,872
  6. Step 6: Final answer
    x = 1,529,315.96

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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.