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Finding the Fourth Proportional to 1,859.45, 2,789.17 and 1,391.41

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Solution

The fourth proportional to 1,859.45, 2,789.17 and 1,391.41 is: 2,087.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,859.45 : 2,789.17 = 1,391.41 : x
  2. Step 2: Convert to fraction form
    1,859.45/2,789.17 = 1,391.41/x
  3. Step 3: Cross multiply
    1,859.45x = 2,789.17 × 1,391.41
  4. Step 4: Simplify right side
    1,859.45x = 3,880,876.40
  5. Step 5: Solve for x
    x = 3,880,876.40/1,859.45
  6. Step 6: Final answer
    x = 2,087.11

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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.