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Finding the Third Proportional to 153 and 331.50

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Solution

The third proportional to 153 and 331.50 is: 718.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    153 : 331.50 = 331.50 : x
  2. Step 2: Convert to fraction form
    153/331.50 = 331.50/x
  3. Step 3: Cross multiply
    153x = 331.50 × 331.50
  4. Step 4: Simplify right side
    153x = 109,892.25
  5. Step 5: Solve for x
    x = 109,892.25/153
  6. Step 6: Final answer
    x = 718.25

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.