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Finding the Fourth Proportional to 643,933.89, 965,889.50 and 223,203.69

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Solution

The fourth proportional to 643,933.89, 965,889.50 and 223,203.69 is: 334,801.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,933.89 : 965,889.50 = 223,203.69 : x
  2. Step 2: Convert to fraction form
    643,933.89/965,889.50 = 223,203.69/x
  3. Step 3: Cross multiply
    643,933.89x = 965,889.50 × 223,203.69
  4. Step 4: Simplify right side
    643,933.89x = 215,590,099,416.24
  5. Step 5: Solve for x
    x = 215,590,099,416.24/643,933.89
  6. Step 6: Final answer
    x = 334,801.60

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1.5x scale

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.