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Finding the Fourth Proportional to 2,190.44, 3,285.88 and 803.45

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Solution

The fourth proportional to 2,190.44, 3,285.88 and 803.45 is: 1,205.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.44 : 3,285.88 = 803.45 : x
  2. Step 2: Convert to fraction form
    2,190.44/3,285.88 = 803.45/x
  3. Step 3: Cross multiply
    2,190.44x = 3,285.88 × 803.45
  4. Step 4: Simplify right side
    2,190.44x = 2,640,046.49
  5. Step 5: Solve for x
    x = 2,640,046.49/2,190.44
  6. Step 6: Final answer
    x = 1,205.26

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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.