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Finding the Fourth Proportional to 1,239.06, 1,709.37 and 796.80

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Solution

The fourth proportional to 1,239.06, 1,709.37 and 796.80 is: 1,099.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.06 : 1,709.37 = 796.80 : x
  2. Step 2: Convert to fraction form
    1,239.06/1,709.37 = 796.80/x
  3. Step 3: Cross multiply
    1,239.06x = 1,709.37 × 796.80
  4. Step 4: Simplify right side
    1,239.06x = 1,362,026.02
  5. Step 5: Solve for x
    x = 1,362,026.02/1,239.06
  6. Step 6: Final answer
    x = 1,099.24

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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.