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Finding the Third Proportional to 713.81 and 917.16

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Solution

The third proportional to 713.81 and 917.16 is: 1,178.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.81 : 917.16 = 917.16 : x
  2. Step 2: Convert to fraction form
    713.81/917.16 = 917.16/x
  3. Step 3: Cross multiply
    713.81x = 917.16 × 917.16
  4. Step 4: Simplify right side
    713.81x = 841,175.59
  5. Step 5: Solve for x
    x = 841,175.59/713.81
  6. Step 6: Final answer
    x = 1,178.43

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.