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Finding the Fourth Proportional to 1,790.35, 2,686.70 and 694.73

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Solution

The fourth proportional to 1,790.35, 2,686.70 and 694.73 is: 1,042.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.35 : 2,686.70 = 694.73 : x
  2. Step 2: Convert to fraction form
    1,790.35/2,686.70 = 694.73/x
  3. Step 3: Cross multiply
    1,790.35x = 2,686.70 × 694.73
  4. Step 4: Simplify right side
    1,790.35x = 1,866,531.09
  5. Step 5: Solve for x
    x = 1,866,531.09/1,790.35
  6. Step 6: Final answer
    x = 1,042.55

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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.