Home / 2,190.60-3,285.90-2,158.20

Finding the Fourth Proportional to 2,190.60, 3,285.90 and 2,158.20

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Solution

The fourth proportional to 2,190.60, 3,285.90 and 2,158.20 is: 3,237.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.60 : 3,285.90 = 2,158.20 : x
  2. Step 2: Convert to fraction form
    2,190.60/3,285.90 = 2,158.20/x
  3. Step 3: Cross multiply
    2,190.60x = 3,285.90 × 2,158.20
  4. Step 4: Simplify right side
    2,190.60x = 7,091,629.38
  5. Step 5: Solve for x
    x = 7,091,629.38/2,190.60
  6. Step 6: Final answer
    x = 3,237.30

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1.5x scale

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.