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Finding the Fourth Proportional to 647,514.90, 971,187.30 and 198,280.80

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Solution

The fourth proportional to 647,514.90, 971,187.30 and 198,280.80 is: 297,395.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,514.90 : 971,187.30 = 198,280.80 : x
  2. Step 2: Convert to fraction form
    647,514.90/971,187.30 = 198,280.80/x
  3. Step 3: Cross multiply
    647,514.90x = 971,187.30 × 198,280.80
  4. Step 4: Simplify right side
    647,514.90x = 192,567,794,793.84
  5. Step 5: Solve for x
    x = 192,567,794,793.84/647,514.90
  6. Step 6: Final answer
    x = 297,395.16

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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.