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Finding the Third Proportional to 499.88 and 782.44

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Solution

The third proportional to 499.88 and 782.44 is: 1,224.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.88 : 782.44 = 782.44 : x
  2. Step 2: Convert to fraction form
    499.88/782.44 = 782.44/x
  3. Step 3: Cross multiply
    499.88x = 782.44 × 782.44
  4. Step 4: Simplify right side
    499.88x = 612,208.44
  5. Step 5: Solve for x
    x = 612,208.44/499.88
  6. Step 6: Final answer
    x = 1,224.72

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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.