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Finding the Third Proportional to 717 and 784.50

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Solution

The third proportional to 717 and 784.50 is: 858.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    717 : 784.50 = 784.50 : x
  2. Step 2: Convert to fraction form
    717/784.50 = 784.50/x
  3. Step 3: Cross multiply
    717x = 784.50 × 784.50
  4. Step 4: Simplify right side
    717x = 615,440.25
  5. Step 5: Solve for x
    x = 615,440.25/717
  6. Step 6: Final answer
    x = 858.35

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.