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Finding the Fourth Proportional to 1,448.26, 1,998.61 and 859.19

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Solution

The fourth proportional to 1,448.26, 1,998.61 and 859.19 is: 1,185.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,448.26 : 1,998.61 = 859.19 : x
  2. Step 2: Convert to fraction form
    1,448.26/1,998.61 = 859.19/x
  3. Step 3: Cross multiply
    1,448.26x = 1,998.61 × 859.19
  4. Step 4: Simplify right side
    1,448.26x = 1,717,173.58
  5. Step 5: Solve for x
    x = 1,717,173.58/1,448.26
  6. Step 6: Final answer
    x = 1,185.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.