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Finding the Third Proportional to 870,836 and 1,319,390

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Solution

The third proportional to 870,836 and 1,319,390 is: 1,998,987.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,836 : 1,319,390 = 1,319,390 : x
  2. Step 2: Convert to fraction form
    870,836/1,319,390 = 1,319,390/x
  3. Step 3: Cross multiply
    870,836x = 1,319,390 × 1,319,390
  4. Step 4: Simplify right side
    870,836x = 1,740,789,972,100
  5. Step 5: Solve for x
    x = 1,740,789,972,100/870,836
  6. Step 6: Final answer
    x = 1,998,987.15

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.