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Finding the Third Proportional to 261.50 and 435.75

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Solution

The third proportional to 261.50 and 435.75 is: 726.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.50 : 435.75 = 435.75 : x
  2. Step 2: Convert to fraction form
    261.50/435.75 = 435.75/x
  3. Step 3: Cross multiply
    261.50x = 435.75 × 435.75
  4. Step 4: Simplify right side
    261.50x = 189,878.06
  5. Step 5: Solve for x
    x = 189,878.06/261.50
  6. Step 6: Final answer
    x = 726.11

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.