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Finding the Fourth Proportional to 699,873.88, 965,856.54 and 393,970

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Solution

The fourth proportional to 699,873.88, 965,856.54 and 393,970 is: 543,695.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,873.88 : 965,856.54 = 393,970 : x
  2. Step 2: Convert to fraction form
    699,873.88/965,856.54 = 393,970/x
  3. Step 3: Cross multiply
    699,873.88x = 965,856.54 × 393,970
  4. Step 4: Simplify right side
    699,873.88x = 380,518,501,063.80
  5. Step 5: Solve for x
    x = 380,518,501,063.80/699,873.88
  6. Step 6: Final answer
    x = 543,695.82

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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.