Home / 1,426.11-2,141.22-909.39

Finding the Fourth Proportional to 1,426.11, 2,141.22 and 909.39

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Solution

The fourth proportional to 1,426.11, 2,141.22 and 909.39 is: 1,365.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.11 : 2,141.22 = 909.39 : x
  2. Step 2: Convert to fraction form
    1,426.11/2,141.22 = 909.39/x
  3. Step 3: Cross multiply
    1,426.11x = 2,141.22 × 909.39
  4. Step 4: Simplify right side
    1,426.11x = 1,947,204.06
  5. Step 5: Solve for x
    x = 1,947,204.06/1,426.11
  6. Step 6: Final answer
    x = 1,365.40

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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.