Home / 1,326.12-1,990.26-677.04

Finding the Fourth Proportional to 1,326.12, 1,990.26 and 677.04

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Solution

The fourth proportional to 1,326.12, 1,990.26 and 677.04 is: 1,016.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.12 : 1,990.26 = 677.04 : x
  2. Step 2: Convert to fraction form
    1,326.12/1,990.26 = 677.04/x
  3. Step 3: Cross multiply
    1,326.12x = 1,990.26 × 677.04
  4. Step 4: Simplify right side
    1,326.12x = 1,347,485.63
  5. Step 5: Solve for x
    x = 1,347,485.63/1,326.12
  6. Step 6: Final answer
    x = 1,016.11

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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.