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Finding the Third Proportional to 356.91 and 761.91

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Solution

The third proportional to 356.91 and 761.91 is: 1,626.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.91 : 761.91 = 761.91 : x
  2. Step 2: Convert to fraction form
    356.91/761.91 = 761.91/x
  3. Step 3: Cross multiply
    356.91x = 761.91 × 761.91
  4. Step 4: Simplify right side
    356.91x = 580,501.13
  5. Step 5: Solve for x
    x = 580,501.13/356.91
  6. Step 6: Final answer
    x = 1,626.48

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.