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Finding the Third Proportional to 264,420 and 515,556

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Solution

The third proportional to 264,420 and 515,556 is: 1,005,211.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,420 : 515,556 = 515,556 : x
  2. Step 2: Convert to fraction form
    264,420/515,556 = 515,556/x
  3. Step 3: Cross multiply
    264,420x = 515,556 × 515,556
  4. Step 4: Simplify right side
    264,420x = 265,797,989,136
  5. Step 5: Solve for x
    x = 265,797,989,136/264,420
  6. Step 6: Final answer
    x = 1,005,211.37

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.