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Finding the Fourth Proportional to 647,866.62, 971,986.59 and 198,653.67

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Solution

The fourth proportional to 647,866.62, 971,986.59 and 198,653.67 is: 298,037.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,866.62 : 971,986.59 = 198,653.67 : x
  2. Step 2: Convert to fraction form
    647,866.62/971,986.59 = 198,653.67/x
  3. Step 3: Cross multiply
    647,866.62x = 971,986.59 × 198,653.67
  4. Step 4: Simplify right side
    647,866.62x = 193,088,703,294.29
  5. Step 5: Solve for x
    x = 193,088,703,294.29/647,866.62
  6. Step 6: Final answer
    x = 298,037.74

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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.