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Finding the Fourth Proportional to 643,523.40, 965,599.98 and 259,256.28

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Solution

The fourth proportional to 643,523.40, 965,599.98 and 259,256.28 is: 389,011.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,523.40 : 965,599.98 = 259,256.28 : x
  2. Step 2: Convert to fraction form
    643,523.40/965,599.98 = 259,256.28/x
  3. Step 3: Cross multiply
    643,523.40x = 965,599.98 × 259,256.28
  4. Step 4: Simplify right side
    643,523.40x = 250,337,858,782.87
  5. Step 5: Solve for x
    x = 250,337,858,782.87/643,523.40
  6. Step 6: Final answer
    x = 389,011.28

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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.