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Finding the Fourth Proportional to 1,081.75, 1,622.69 and 351.39

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Solution

The fourth proportional to 1,081.75, 1,622.69 and 351.39 is: 527.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.75 : 1,622.69 = 351.39 : x
  2. Step 2: Convert to fraction form
    1,081.75/1,622.69 = 351.39/x
  3. Step 3: Cross multiply
    1,081.75x = 1,622.69 × 351.39
  4. Step 4: Simplify right side
    1,081.75x = 570,197.04
  5. Step 5: Solve for x
    x = 570,197.04/1,081.75
  6. Step 6: Final answer
    x = 527.11

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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.