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Finding the Fourth Proportional to 1,285,906.04, 1,928,964.26 and 645,880.69

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Solution

The fourth proportional to 1,285,906.04, 1,928,964.26 and 645,880.69 is: 968,873.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,906.04 : 1,928,964.26 = 645,880.69 : x
  2. Step 2: Convert to fraction form
    1,285,906.04/1,928,964.26 = 645,880.69/x
  3. Step 3: Cross multiply
    1,285,906.04x = 1,928,964.26 × 645,880.69
  4. Step 4: Simplify right side
    1,285,906.04x = 1,245,880,767,234.14
  5. Step 5: Solve for x
    x = 1,245,880,767,234.14/1,285,906.04
  6. Step 6: Final answer
    x = 968,873.87

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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.