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Finding the Third Proportional to 405.94 and 613.88

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Solution

The third proportional to 405.94 and 613.88 is: 928.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.94 : 613.88 = 613.88 : x
  2. Step 2: Convert to fraction form
    405.94/613.88 = 613.88/x
  3. Step 3: Cross multiply
    405.94x = 613.88 × 613.88
  4. Step 4: Simplify right side
    405.94x = 376,842.52
  5. Step 5: Solve for x
    x = 376,842.52/405.94
  6. Step 6: Final answer
    x = 928.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.