Home / 1,812.68-2,720.38-1,326.98

Finding the Fourth Proportional to 1,812.68, 2,720.38 and 1,326.98

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Solution

The fourth proportional to 1,812.68, 2,720.38 and 1,326.98 is: 1,991.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.68 : 2,720.38 = 1,326.98 : x
  2. Step 2: Convert to fraction form
    1,812.68/2,720.38 = 1,326.98/x
  3. Step 3: Cross multiply
    1,812.68x = 2,720.38 × 1,326.98
  4. Step 4: Simplify right side
    1,812.68x = 3,609,889.85
  5. Step 5: Solve for x
    x = 3,609,889.85/1,812.68
  6. Step 6: Final answer
    x = 1,991.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.