Home / 1,581.36-2,181.83-1,021.85

Finding the Fourth Proportional to 1,581.36, 2,181.83 and 1,021.85

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Solution

The fourth proportional to 1,581.36, 2,181.83 and 1,021.85 is: 1,409.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.36 : 2,181.83 = 1,021.85 : x
  2. Step 2: Convert to fraction form
    1,581.36/2,181.83 = 1,021.85/x
  3. Step 3: Cross multiply
    1,581.36x = 2,181.83 × 1,021.85
  4. Step 4: Simplify right side
    1,581.36x = 2,229,502.99
  5. Step 5: Solve for x
    x = 2,229,502.99/1,581.36
  6. Step 6: Final answer
    x = 1,409.86

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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.