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Finding the Third Proportional to 722.81 and 913.36

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Solution

The third proportional to 722.81 and 913.36 is: 1,154.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.81 : 913.36 = 913.36 : x
  2. Step 2: Convert to fraction form
    722.81/913.36 = 913.36/x
  3. Step 3: Cross multiply
    722.81x = 913.36 × 913.36
  4. Step 4: Simplify right side
    722.81x = 834,225.35
  5. Step 5: Solve for x
    x = 834,225.35/722.81
  6. Step 6: Final answer
    x = 1,154.14

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Why These Related Problems?

These problems maintain the same ratio (1.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.