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Finding the Fourth Proportional to 1,189.66, 1,786.22 and 844.83

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Solution

The fourth proportional to 1,189.66, 1,786.22 and 844.83 is: 1,268.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.66 : 1,786.22 = 844.83 : x
  2. Step 2: Convert to fraction form
    1,189.66/1,786.22 = 844.83/x
  3. Step 3: Cross multiply
    1,189.66x = 1,786.22 × 844.83
  4. Step 4: Simplify right side
    1,189.66x = 1,509,051.19
  5. Step 5: Solve for x
    x = 1,509,051.19/1,189.66
  6. Step 6: Final answer
    x = 1,268.47

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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.