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Finding the Fourth Proportional to 647,661.84, 971,557.54 and 198,377.52

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Solution

The fourth proportional to 647,661.84, 971,557.54 and 198,377.52 is: 297,586.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,661.84 : 971,557.54 = 198,377.52 : x
  2. Step 2: Convert to fraction form
    647,661.84/971,557.54 = 198,377.52/x
  3. Step 3: Cross multiply
    647,661.84x = 971,557.54 × 198,377.52
  4. Step 4: Simplify right side
    647,661.84x = 192,735,175,322.50
  5. Step 5: Solve for x
    x = 192,735,175,322.50/647,661.84
  6. Step 6: Final answer
    x = 297,586.12

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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.