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Finding the Fourth Proportional to 643,804.40, 965,701.80 and 194,524.40

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Solution

The fourth proportional to 643,804.40, 965,701.80 and 194,524.40 is: 291,785.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,804.40 : 965,701.80 = 194,524.40 : x
  2. Step 2: Convert to fraction form
    643,804.40/965,701.80 = 194,524.40/x
  3. Step 3: Cross multiply
    643,804.40x = 965,701.80 × 194,524.40
  4. Step 4: Simplify right side
    643,804.40x = 187,852,563,223.92
  5. Step 5: Solve for x
    x = 187,852,563,223.92/643,804.40
  6. Step 6: Final answer
    x = 291,785.15

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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.