Home / 1,861.30-2,567.28-1,231.48

Finding the Fourth Proportional to 1,861.30, 2,567.28 and 1,231.48

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Solution

The fourth proportional to 1,861.30, 2,567.28 and 1,231.48 is: 1,698.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.30 : 2,567.28 = 1,231.48 : x
  2. Step 2: Convert to fraction form
    1,861.30/2,567.28 = 1,231.48/x
  3. Step 3: Cross multiply
    1,861.30x = 2,567.28 × 1,231.48
  4. Step 4: Simplify right side
    1,861.30x = 3,161,553.97
  5. Step 5: Solve for x
    x = 3,161,553.97/1,861.30
  6. Step 6: Final answer
    x = 1,698.57

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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.