Home / 1,811.60-2,719.38-1,405.64

Finding the Fourth Proportional to 1,811.60, 2,719.38 and 1,405.64

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Solution

The fourth proportional to 1,811.60, 2,719.38 and 1,405.64 is: 2,110.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.60 : 2,719.38 = 1,405.64 : x
  2. Step 2: Convert to fraction form
    1,811.60/2,719.38 = 1,405.64/x
  3. Step 3: Cross multiply
    1,811.60x = 2,719.38 × 1,405.64
  4. Step 4: Simplify right side
    1,811.60x = 3,822,469.30
  5. Step 5: Solve for x
    x = 3,822,469.30/1,811.60
  6. Step 6: Final answer
    x = 2,110.00

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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.