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Finding the Fourth Proportional to 221,686.40, 332,529.60 and 204,579.20

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Solution

The fourth proportional to 221,686.40, 332,529.60 and 204,579.20 is: 306,868.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,686.40 : 332,529.60 = 204,579.20 : x
  2. Step 2: Convert to fraction form
    221,686.40/332,529.60 = 204,579.20/x
  3. Step 3: Cross multiply
    221,686.40x = 332,529.60 × 204,579.20
  4. Step 4: Simplify right side
    221,686.40x = 68,028,639,544.32
  5. Step 5: Solve for x
    x = 68,028,639,544.32/221,686.40
  6. Step 6: Final answer
    x = 306,868.80

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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.