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Finding the Fourth Proportional to 1,831.45, 2,745.20 and 791.95

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Solution

The fourth proportional to 1,831.45, 2,745.20 and 791.95 is: 1,187.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,831.45 : 2,745.20 = 791.95 : x
  2. Step 2: Convert to fraction form
    1,831.45/2,745.20 = 791.95/x
  3. Step 3: Cross multiply
    1,831.45x = 2,745.20 × 791.95
  4. Step 4: Simplify right side
    1,831.45x = 2,174,047.41
  5. Step 5: Solve for x
    x = 2,174,047.41/1,831.45
  6. Step 6: Final answer
    x = 1,187.06

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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.