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Finding the Fourth Proportional to 1,401,805.28, 1,933,880.88 and 857,965.28

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Solution

The fourth proportional to 1,401,805.28, 1,933,880.88 and 857,965.28 is: 1,183,618.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401,805.28 : 1,933,880.88 = 857,965.28 : x
  2. Step 2: Convert to fraction form
    1,401,805.28/1,933,880.88 = 857,965.28/x
  3. Step 3: Cross multiply
    1,401,805.28x = 1,933,880.88 × 857,965.28
  4. Step 4: Simplify right side
    1,401,805.28x = 1,659,202,650,695.85
  5. Step 5: Solve for x
    x = 1,659,202,650,695.85/1,401,805.28
  6. Step 6: Final answer
    x = 1,183,618.49

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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.