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Finding the Fourth Proportional to 445,639.20, 668,458.80 and 268,054.80

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Solution

The fourth proportional to 445,639.20, 668,458.80 and 268,054.80 is: 402,082.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,639.20 : 668,458.80 = 268,054.80 : x
  2. Step 2: Convert to fraction form
    445,639.20/668,458.80 = 268,054.80/x
  3. Step 3: Cross multiply
    445,639.20x = 668,458.80 × 268,054.80
  4. Step 4: Simplify right side
    445,639.20x = 179,183,589,942.24
  5. Step 5: Solve for x
    x = 179,183,589,942.24/445,639.20
  6. Step 6: Final answer
    x = 402,082.20

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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.