Home / 1,812.23-2,720-1,120.24

Finding the Fourth Proportional to 1,812.23, 2,720 and 1,120.24

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Solution

The fourth proportional to 1,812.23, 2,720 and 1,120.24 is: 1,681.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.23 : 2,720 = 1,120.24 : x
  2. Step 2: Convert to fraction form
    1,812.23/2,720 = 1,120.24/x
  3. Step 3: Cross multiply
    1,812.23x = 2,720 × 1,120.24
  4. Step 4: Simplify right side
    1,812.23x = 3,047,052.80
  5. Step 5: Solve for x
    x = 3,047,052.80/1,812.23
  6. Step 6: Final answer
    x = 1,681.38

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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.