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Finding the Third Proportional to 285.66 and 426.61

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Solution

The third proportional to 285.66 and 426.61 is: 637.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.66 : 426.61 = 426.61 : x
  2. Step 2: Convert to fraction form
    285.66/426.61 = 426.61/x
  3. Step 3: Cross multiply
    285.66x = 426.61 × 426.61
  4. Step 4: Simplify right side
    285.66x = 181,999.93
  5. Step 5: Solve for x
    x = 181,999.93/285.66
  6. Step 6: Final answer
    x = 637.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.