Home / 1,376.36-1,901.22-1,311.56

Finding the Fourth Proportional to 1,376.36, 1,901.22 and 1,311.56

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Solution

The fourth proportional to 1,376.36, 1,901.22 and 1,311.56 is: 1,811.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376.36 : 1,901.22 = 1,311.56 : x
  2. Step 2: Convert to fraction form
    1,376.36/1,901.22 = 1,311.56/x
  3. Step 3: Cross multiply
    1,376.36x = 1,901.22 × 1,311.56
  4. Step 4: Simplify right side
    1,376.36x = 2,493,564.10
  5. Step 5: Solve for x
    x = 2,493,564.10/1,376.36
  6. Step 6: Final answer
    x = 1,811.71

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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.