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Finding the Third Proportional to 399,172 and 860,552

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Solution

The third proportional to 399,172 and 860,552 is: 1,855,214.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,172 : 860,552 = 860,552 : x
  2. Step 2: Convert to fraction form
    399,172/860,552 = 860,552/x
  3. Step 3: Cross multiply
    399,172x = 860,552 × 860,552
  4. Step 4: Simplify right side
    399,172x = 740,549,744,704
  5. Step 5: Solve for x
    x = 740,549,744,704/399,172
  6. Step 6: Final answer
    x = 1,855,214.66

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.