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Finding the Fourth Proportional to 490,880.72, 677,390.65 and 276,007.97

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Solution

The fourth proportional to 490,880.72, 677,390.65 and 276,007.97 is: 380,877.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,880.72 : 677,390.65 = 276,007.97 : x
  2. Step 2: Convert to fraction form
    490,880.72/677,390.65 = 276,007.97/x
  3. Step 3: Cross multiply
    490,880.72x = 677,390.65 × 276,007.97
  4. Step 4: Simplify right side
    490,880.72x = 186,965,219,206.94
  5. Step 5: Solve for x
    x = 186,965,219,206.94/490,880.72
  6. Step 6: Final answer
    x = 380,877.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.