Home / 1,811.10-2,716.65-1,325.10

Finding the Fourth Proportional to 1,811.10, 2,716.65 and 1,325.10

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Solution

The fourth proportional to 1,811.10, 2,716.65 and 1,325.10 is: 1,987.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.10 : 2,716.65 = 1,325.10 : x
  2. Step 2: Convert to fraction form
    1,811.10/2,716.65 = 1,325.10/x
  3. Step 3: Cross multiply
    1,811.10x = 2,716.65 × 1,325.10
  4. Step 4: Simplify right side
    1,811.10x = 3,599,832.92
  5. Step 5: Solve for x
    x = 3,599,832.92/1,811.10
  6. Step 6: Final answer
    x = 1,987.65

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1.5x scale

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.