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Finding the Third Proportional to 520.25 and 782.50

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Solution

The third proportional to 520.25 and 782.50 is: 1,176.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.25 : 782.50 = 782.50 : x
  2. Step 2: Convert to fraction form
    520.25/782.50 = 782.50/x
  3. Step 3: Cross multiply
    520.25x = 782.50 × 782.50
  4. Step 4: Simplify right side
    520.25x = 612,306.25
  5. Step 5: Solve for x
    x = 612,306.25/520.25
  6. Step 6: Final answer
    x = 1,176.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.