Home / 1,581.07-2,181.44-1,021.57

Finding the Fourth Proportional to 1,581.07, 2,181.44 and 1,021.57

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Solution

The fourth proportional to 1,581.07, 2,181.44 and 1,021.57 is: 1,409.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.07 : 2,181.44 = 1,021.57 : x
  2. Step 2: Convert to fraction form
    1,581.07/2,181.44 = 1,021.57/x
  3. Step 3: Cross multiply
    1,581.07x = 2,181.44 × 1,021.57
  4. Step 4: Simplify right side
    1,581.07x = 2,228,493.66
  5. Step 5: Solve for x
    x = 2,228,493.66/1,581.07
  6. Step 6: Final answer
    x = 1,409.48

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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.