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Finding the Third Proportional to 393,889 and 859,070

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Solution

The third proportional to 393,889 and 859,070 is: 1,873,627.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,889 : 859,070 = 859,070 : x
  2. Step 2: Convert to fraction form
    393,889/859,070 = 859,070/x
  3. Step 3: Cross multiply
    393,889x = 859,070 × 859,070
  4. Step 4: Simplify right side
    393,889x = 738,001,264,900
  5. Step 5: Solve for x
    x = 738,001,264,900/393,889
  6. Step 6: Final answer
    x = 1,873,627.51

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.