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Finding the Third Proportional to 351.61 and 515.95

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Solution

The third proportional to 351.61 and 515.95 is: 757.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.61 : 515.95 = 515.95 : x
  2. Step 2: Convert to fraction form
    351.61/515.95 = 515.95/x
  3. Step 3: Cross multiply
    351.61x = 515.95 × 515.95
  4. Step 4: Simplify right side
    351.61x = 266,207.63
  5. Step 5: Solve for x
    x = 266,207.63/351.61
  6. Step 6: Final answer
    x = 757.11

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.