Home / 1,581.36-2,179.35-1,231.44

Finding the Fourth Proportional to 1,581.36, 2,179.35 and 1,231.44

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Solution

The fourth proportional to 1,581.36, 2,179.35 and 1,231.44 is: 1,697.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.36 : 2,179.35 = 1,231.44 : x
  2. Step 2: Convert to fraction form
    1,581.36/2,179.35 = 1,231.44/x
  3. Step 3: Cross multiply
    1,581.36x = 2,179.35 × 1,231.44
  4. Step 4: Simplify right side
    1,581.36x = 2,683,738.76
  5. Step 5: Solve for x
    x = 2,683,738.76/1,581.36
  6. Step 6: Final answer
    x = 1,697.11

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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.