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Finding the Third Proportional to 690.19 and 1,517.06

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Solution

The third proportional to 690.19 and 1,517.06 is: 3,334.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.19 : 1,517.06 = 1,517.06 : x
  2. Step 2: Convert to fraction form
    690.19/1,517.06 = 1,517.06/x
  3. Step 3: Cross multiply
    690.19x = 1,517.06 × 1,517.06
  4. Step 4: Simplify right side
    690.19x = 2,301,478.63
  5. Step 5: Solve for x
    x = 2,301,478.63/690.19
  6. Step 6: Final answer
    x = 3,334.57

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.