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Finding the Fourth Proportional to 2,194.80, 3,285.80 and 2,130.80

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Solution

The fourth proportional to 2,194.80, 3,285.80 and 2,130.80 is: 3,189.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,194.80 : 3,285.80 = 2,130.80 : x
  2. Step 2: Convert to fraction form
    2,194.80/3,285.80 = 2,130.80/x
  3. Step 3: Cross multiply
    2,194.80x = 3,285.80 × 2,130.80
  4. Step 4: Simplify right side
    2,194.80x = 7,001,382.64
  5. Step 5: Solve for x
    x = 7,001,382.64/2,194.80
  6. Step 6: Final answer
    x = 3,189.99

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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.