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Finding the Fourth Proportional to 445,179.28, 667,423.80 and 220,384.72

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Solution

The fourth proportional to 445,179.28, 667,423.80 and 220,384.72 is: 330,406.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,179.28 : 667,423.80 = 220,384.72 : x
  2. Step 2: Convert to fraction form
    445,179.28/667,423.80 = 220,384.72/x
  3. Step 3: Cross multiply
    445,179.28x = 667,423.80 × 220,384.72
  4. Step 4: Simplify right side
    445,179.28x = 147,090,007,284.34
  5. Step 5: Solve for x
    x = 147,090,007,284.34/445,179.28
  6. Step 6: Final answer
    x = 330,406.23

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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.