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Finding the Third Proportional to 492.75 and 856.38

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Solution

The third proportional to 492.75 and 856.38 is: 1,488.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.75 : 856.38 = 856.38 : x
  2. Step 2: Convert to fraction form
    492.75/856.38 = 856.38/x
  3. Step 3: Cross multiply
    492.75x = 856.38 × 856.38
  4. Step 4: Simplify right side
    492.75x = 733,378.14
  5. Step 5: Solve for x
    x = 733,378.14/492.75
  6. Step 6: Final answer
    x = 1,488.34

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Why These Related Problems?

These problems maintain the same ratio (1.74) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.