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Finding the Fourth Proportional to 1,081.43, 1,622.14 and 898.95

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Solution

The fourth proportional to 1,081.43, 1,622.14 and 898.95 is: 1,348.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.43 : 1,622.14 = 898.95 : x
  2. Step 2: Convert to fraction form
    1,081.43/1,622.14 = 898.95/x
  3. Step 3: Cross multiply
    1,081.43x = 1,622.14 × 898.95
  4. Step 4: Simplify right side
    1,081.43x = 1,458,218.73
  5. Step 5: Solve for x
    x = 1,458,218.73/1,081.43
  6. Step 6: Final answer
    x = 1,348.42

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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.