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Finding the Third Proportional to 142,201 and 311,185

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Solution

The third proportional to 142,201 and 311,185 is: 680,980.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,201 : 311,185 = 311,185 : x
  2. Step 2: Convert to fraction form
    142,201/311,185 = 311,185/x
  3. Step 3: Cross multiply
    142,201x = 311,185 × 311,185
  4. Step 4: Simplify right side
    142,201x = 96,836,104,225
  5. Step 5: Solve for x
    x = 96,836,104,225/142,201
  6. Step 6: Final answer
    x = 680,980.47

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.