Home / 1,409.32-2,105.39-1,121.08

Finding the Fourth Proportional to 1,409.32, 2,105.39 and 1,121.08

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Solution

The fourth proportional to 1,409.32, 2,105.39 and 1,121.08 is: 1,674.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.32 : 2,105.39 = 1,121.08 : x
  2. Step 2: Convert to fraction form
    1,409.32/2,105.39 = 1,121.08/x
  3. Step 3: Cross multiply
    1,409.32x = 2,105.39 × 1,121.08
  4. Step 4: Simplify right side
    1,409.32x = 2,360,310.62
  5. Step 5: Solve for x
    x = 2,360,310.62/1,409.32
  6. Step 6: Final answer
    x = 1,674.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.