Home / 1,581.67-2,181.99-1,076.91

Finding the Fourth Proportional to 1,581.67, 2,181.99 and 1,076.91

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Solution

The fourth proportional to 1,581.67, 2,181.99 and 1,076.91 is: 1,485.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.67 : 2,181.99 = 1,076.91 : x
  2. Step 2: Convert to fraction form
    1,581.67/2,181.99 = 1,076.91/x
  3. Step 3: Cross multiply
    1,581.67x = 2,181.99 × 1,076.91
  4. Step 4: Simplify right side
    1,581.67x = 2,349,806.85
  5. Step 5: Solve for x
    x = 2,349,806.85/1,581.67
  6. Step 6: Final answer
    x = 1,485.65

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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.