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Finding the Fourth Proportional to 1,227.06, 1,840.59 and 863.48

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Solution

The fourth proportional to 1,227.06, 1,840.59 and 863.48 is: 1,295.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.06 : 1,840.59 = 863.48 : x
  2. Step 2: Convert to fraction form
    1,227.06/1,840.59 = 863.48/x
  3. Step 3: Cross multiply
    1,227.06x = 1,840.59 × 863.48
  4. Step 4: Simplify right side
    1,227.06x = 1,589,303.45
  5. Step 5: Solve for x
    x = 1,589,303.45/1,227.06
  6. Step 6: Final answer
    x = 1,295.21

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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.