Home / 2,190.90-3,022.74-1,561.53

Finding the Fourth Proportional to 2,190.90, 3,022.74 and 1,561.53

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Solution

The fourth proportional to 2,190.90, 3,022.74 and 1,561.53 is: 2,154.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.90 : 3,022.74 = 1,561.53 : x
  2. Step 2: Convert to fraction form
    2,190.90/3,022.74 = 1,561.53/x
  3. Step 3: Cross multiply
    2,190.90x = 3,022.74 × 1,561.53
  4. Step 4: Simplify right side
    2,190.90x = 4,720,099.19
  5. Step 5: Solve for x
    x = 4,720,099.19/2,190.90
  6. Step 6: Final answer
    x = 2,154.41

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1.5x scale

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.