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Finding the Third Proportional to 202 and 315.50

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Solution

The third proportional to 202 and 315.50 is: 492.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    202 : 315.50 = 315.50 : x
  2. Step 2: Convert to fraction form
    202/315.50 = 315.50/x
  3. Step 3: Cross multiply
    202x = 315.50 × 315.50
  4. Step 4: Simplify right side
    202x = 99,540.25
  5. Step 5: Solve for x
    x = 99,540.25/202
  6. Step 6: Final answer
    x = 492.77

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.