Home / 2,190.17-3,022.68-1,220.12

Finding the Fourth Proportional to 2,190.17, 3,022.68 and 1,220.12

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Solution

The fourth proportional to 2,190.17, 3,022.68 and 1,220.12 is: 1,683.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.17 : 3,022.68 = 1,220.12 : x
  2. Step 2: Convert to fraction form
    2,190.17/3,022.68 = 1,220.12/x
  3. Step 3: Cross multiply
    2,190.17x = 3,022.68 × 1,220.12
  4. Step 4: Simplify right side
    2,190.17x = 3,688,017.21
  5. Step 5: Solve for x
    x = 3,688,017.21/2,190.17
  6. Step 6: Final answer
    x = 1,683.90

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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.