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Finding the Fourth Proportional to 271,761.20, 405,811.81 and 221,940.20

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Solution

The fourth proportional to 271,761.20, 405,811.81 and 221,940.20 is: 331,415.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,761.20 : 405,811.81 = 221,940.20 : x
  2. Step 2: Convert to fraction form
    271,761.20/405,811.81 = 221,940.20/x
  3. Step 3: Cross multiply
    271,761.20x = 405,811.81 × 221,940.20
  4. Step 4: Simplify right side
    271,761.20x = 90,065,954,273.76
  5. Step 5: Solve for x
    x = 90,065,954,273.76/271,761.20
  6. Step 6: Final answer
    x = 331,415.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.