Home / 1,326.40-1,989.24-1,108.42

Finding the Fourth Proportional to 1,326.40, 1,989.24 and 1,108.42

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Solution

The fourth proportional to 1,326.40, 1,989.24 and 1,108.42 is: 1,662.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.40 : 1,989.24 = 1,108.42 : x
  2. Step 2: Convert to fraction form
    1,326.40/1,989.24 = 1,108.42/x
  3. Step 3: Cross multiply
    1,326.40x = 1,989.24 × 1,108.42
  4. Step 4: Simplify right side
    1,326.40x = 2,204,913.40
  5. Step 5: Solve for x
    x = 2,204,913.40/1,326.40
  6. Step 6: Final answer
    x = 1,662.33

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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.