Home / 1,811.64-2,711.88-1,399.80

Finding the Fourth Proportional to 1,811.64, 2,711.88 and 1,399.80

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Solution

The fourth proportional to 1,811.64, 2,711.88 and 1,399.80 is: 2,095.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.64 : 2,711.88 = 1,399.80 : x
  2. Step 2: Convert to fraction form
    1,811.64/2,711.88 = 1,399.80/x
  3. Step 3: Cross multiply
    1,811.64x = 2,711.88 × 1,399.80
  4. Step 4: Simplify right side
    1,811.64x = 3,796,089.62
  5. Step 5: Solve for x
    x = 3,796,089.62/1,811.64
  6. Step 6: Final answer
    x = 2,095.39

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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.