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Finding the Third Proportional to 991.75 and 1,519.50

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Solution

The third proportional to 991.75 and 1,519.50 is: 2,328.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    991.75 : 1,519.50 = 1,519.50 : x
  2. Step 2: Convert to fraction form
    991.75/1,519.50 = 1,519.50/x
  3. Step 3: Cross multiply
    991.75x = 1,519.50 × 1,519.50
  4. Step 4: Simplify right side
    991.75x = 2,308,880.25
  5. Step 5: Solve for x
    x = 2,308,880.25/991.75
  6. Step 6: Final answer
    x = 2,328.09

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.