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Finding the Third Proportional to 291,213 and 636,306

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Solution

The third proportional to 291,213 and 636,306 is: 1,390,340.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,213 : 636,306 = 636,306 : x
  2. Step 2: Convert to fraction form
    291,213/636,306 = 636,306/x
  3. Step 3: Cross multiply
    291,213x = 636,306 × 636,306
  4. Step 4: Simplify right side
    291,213x = 404,885,325,636
  5. Step 5: Solve for x
    x = 404,885,325,636/291,213
  6. Step 6: Final answer
    x = 1,390,340.84

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.