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Finding the Third Proportional to 186,989 and 402,489

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Solution

The third proportional to 186,989 and 402,489 is: 866,347.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,989 : 402,489 = 402,489 : x
  2. Step 2: Convert to fraction form
    186,989/402,489 = 402,489/x
  3. Step 3: Cross multiply
    186,989x = 402,489 × 402,489
  4. Step 4: Simplify right side
    186,989x = 161,997,395,121
  5. Step 5: Solve for x
    x = 161,997,395,121/186,989
  6. Step 6: Final answer
    x = 866,347.19

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.