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Finding the Third Proportional to 687.50 and 1,482

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Solution

The third proportional to 687.50 and 1,482 is: 3,194.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.50 : 1,482 = 1,482 : x
  2. Step 2: Convert to fraction form
    687.50/1,482 = 1,482/x
  3. Step 3: Cross multiply
    687.50x = 1,482 × 1,482
  4. Step 4: Simplify right side
    687.50x = 2,196,324
  5. Step 5: Solve for x
    x = 2,196,324/687.50
  6. Step 6: Final answer
    x = 3,194.65

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.