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Finding the Third Proportional to 624.50 and 912.75

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Solution

The third proportional to 624.50 and 912.75 is: 1,334.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.50 : 912.75 = 912.75 : x
  2. Step 2: Convert to fraction form
    624.50/912.75 = 912.75/x
  3. Step 3: Cross multiply
    624.50x = 912.75 × 912.75
  4. Step 4: Simplify right side
    624.50x = 833,112.56
  5. Step 5: Solve for x
    x = 833,112.56/624.50
  6. Step 6: Final answer
    x = 1,334.05

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.