Home / 1,761.12-2,431.62-1,172.88

Finding the Fourth Proportional to 1,761.12, 2,431.62 and 1,172.88

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Solution

The fourth proportional to 1,761.12, 2,431.62 and 1,172.88 is: 1,619.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.12 : 2,431.62 = 1,172.88 : x
  2. Step 2: Convert to fraction form
    1,761.12/2,431.62 = 1,172.88/x
  3. Step 3: Cross multiply
    1,761.12x = 2,431.62 × 1,172.88
  4. Step 4: Simplify right side
    1,761.12x = 2,851,998.47
  5. Step 5: Solve for x
    x = 2,851,998.47/1,761.12
  6. Step 6: Final answer
    x = 1,619.42

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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.