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Finding the Fourth Proportional to 1,786.15, 2,678.82 and 908.09

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Solution

The fourth proportional to 1,786.15, 2,678.82 and 908.09 is: 1,361.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.15 : 2,678.82 = 908.09 : x
  2. Step 2: Convert to fraction form
    1,786.15/2,678.82 = 908.09/x
  3. Step 3: Cross multiply
    1,786.15x = 2,678.82 × 908.09
  4. Step 4: Simplify right side
    1,786.15x = 2,432,609.65
  5. Step 5: Solve for x
    x = 2,432,609.65/1,786.15
  6. Step 6: Final answer
    x = 1,361.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.