Home / 1,811.12-2,499.40-1,025.20

Finding the Fourth Proportional to 1,811.12, 2,499.40 and 1,025.20

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Solution

The fourth proportional to 1,811.12, 2,499.40 and 1,025.20 is: 1,414.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.12 : 2,499.40 = 1,025.20 : x
  2. Step 2: Convert to fraction form
    1,811.12/2,499.40 = 1,025.20/x
  3. Step 3: Cross multiply
    1,811.12x = 2,499.40 × 1,025.20
  4. Step 4: Simplify right side
    1,811.12x = 2,562,384.88
  5. Step 5: Solve for x
    x = 2,562,384.88/1,811.12
  6. Step 6: Final answer
    x = 1,414.81

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1.5x scale

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.