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Finding the Third Proportional to 487.50 and 874.50

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Solution

The third proportional to 487.50 and 874.50 is: 1,568.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.50 : 874.50 = 874.50 : x
  2. Step 2: Convert to fraction form
    487.50/874.50 = 874.50/x
  3. Step 3: Cross multiply
    487.50x = 874.50 × 874.50
  4. Step 4: Simplify right side
    487.50x = 764,750.25
  5. Step 5: Solve for x
    x = 764,750.25/487.50
  6. Step 6: Final answer
    x = 1,568.72

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.