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Finding the Fourth Proportional to 1,296.82, 1,790.34 and 993.41

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Solution

The fourth proportional to 1,296.82, 1,790.34 and 993.41 is: 1,371.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.82 : 1,790.34 = 993.41 : x
  2. Step 2: Convert to fraction form
    1,296.82/1,790.34 = 993.41/x
  3. Step 3: Cross multiply
    1,296.82x = 1,790.34 × 993.41
  4. Step 4: Simplify right side
    1,296.82x = 1,778,541.66
  5. Step 5: Solve for x
    x = 1,778,541.66/1,296.82
  6. Step 6: Final answer
    x = 1,371.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.