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Finding the Third Proportional to 426,270 and 636,480

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Solution

The third proportional to 426,270 and 636,480 is: 950,352.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,270 : 636,480 = 636,480 : x
  2. Step 2: Convert to fraction form
    426,270/636,480 = 636,480/x
  3. Step 3: Cross multiply
    426,270x = 636,480 × 636,480
  4. Step 4: Simplify right side
    426,270x = 405,106,790,400
  5. Step 5: Solve for x
    x = 405,106,790,400/426,270
  6. Step 6: Final answer
    x = 950,352.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.