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Finding the Third Proportional to 636.47 and 999.84

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Solution

The third proportional to 636.47 and 999.84 is: 1,570.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.47 : 999.84 = 999.84 : x
  2. Step 2: Convert to fraction form
    636.47/999.84 = 999.84/x
  3. Step 3: Cross multiply
    636.47x = 999.84 × 999.84
  4. Step 4: Simplify right side
    636.47x = 999,687.52
  5. Step 5: Solve for x
    x = 999,687.52/636.47
  6. Step 6: Final answer
    x = 1,570.68

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.