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Finding the Fourth Proportional to 691,753, 954,633.72 and 389,947

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Solution

The fourth proportional to 691,753, 954,633.72 and 389,947 is: 538,135.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,753 : 954,633.72 = 389,947 : x
  2. Step 2: Convert to fraction form
    691,753/954,633.72 = 389,947/x
  3. Step 3: Cross multiply
    691,753x = 954,633.72 × 389,947
  4. Step 4: Simplify right side
    691,753x = 372,256,555,212.84
  5. Step 5: Solve for x
    x = 372,256,555,212.84/691,753
  6. Step 6: Final answer
    x = 538,135.08

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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.