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Finding the Third Proportional to 665.50 and 1,435

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Solution

The third proportional to 665.50 and 1,435 is: 3,094.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.50 : 1,435 = 1,435 : x
  2. Step 2: Convert to fraction form
    665.50/1,435 = 1,435/x
  3. Step 3: Cross multiply
    665.50x = 1,435 × 1,435
  4. Step 4: Simplify right side
    665.50x = 2,059,225
  5. Step 5: Solve for x
    x = 2,059,225/665.50
  6. Step 6: Final answer
    x = 3,094.25

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.