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Finding the Third Proportional to 720.42 and 945.84

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Solution

The third proportional to 720.42 and 945.84 is: 1,241.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.42 : 945.84 = 945.84 : x
  2. Step 2: Convert to fraction form
    720.42/945.84 = 945.84/x
  3. Step 3: Cross multiply
    720.42x = 945.84 × 945.84
  4. Step 4: Simplify right side
    720.42x = 894,620.40
  5. Step 5: Solve for x
    x = 894,620.40/720.42
  6. Step 6: Final answer
    x = 1,241.80

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.