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Finding the Third Proportional to 272,490 and 636,458

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Solution

The third proportional to 272,490 and 636,458 is: 1,486,582.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,490 : 636,458 = 636,458 : x
  2. Step 2: Convert to fraction form
    272,490/636,458 = 636,458/x
  3. Step 3: Cross multiply
    272,490x = 636,458 × 636,458
  4. Step 4: Simplify right side
    272,490x = 405,078,785,764
  5. Step 5: Solve for x
    x = 405,078,785,764/272,490
  6. Step 6: Final answer
    x = 1,486,582.21

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.