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Finding the Third Proportional to 489 and 732.50

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Solution

The third proportional to 489 and 732.50 is: 1,097.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    489 : 732.50 = 732.50 : x
  2. Step 2: Convert to fraction form
    489/732.50 = 732.50/x
  3. Step 3: Cross multiply
    489x = 732.50 × 732.50
  4. Step 4: Simplify right side
    489x = 536,556.25
  5. Step 5: Solve for x
    x = 536,556.25/489
  6. Step 6: Final answer
    x = 1,097.25

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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.