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Finding the Third Proportional to 366,989 and 561,423

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Solution

The third proportional to 366,989 and 561,423 is: 858,869.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    366,989 : 561,423 = 561,423 : x
  2. Step 2: Convert to fraction form
    366,989/561,423 = 561,423/x
  3. Step 3: Cross multiply
    366,989x = 561,423 × 561,423
  4. Step 4: Simplify right side
    366,989x = 315,195,784,929
  5. Step 5: Solve for x
    x = 315,195,784,929/366,989
  6. Step 6: Final answer
    x = 858,869.84

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.