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Finding the Third Proportional to 870,490 and 1,917,519

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Solution

The third proportional to 870,490 and 1,917,519 is: 4,223,918.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,490 : 1,917,519 = 1,917,519 : x
  2. Step 2: Convert to fraction form
    870,490/1,917,519 = 1,917,519/x
  3. Step 3: Cross multiply
    870,490x = 1,917,519 × 1,917,519
  4. Step 4: Simplify right side
    870,490x = 3,676,879,115,361
  5. Step 5: Solve for x
    x = 3,676,879,115,361/870,490
  6. Step 6: Final answer
    x = 4,223,918.84

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.