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Finding the Fourth Proportional to 647,000.69, 892,927.38 and 388,961.17

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Solution

The fourth proportional to 647,000.69, 892,927.38 and 388,961.17 is: 536,806.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,000.69 : 892,927.38 = 388,961.17 : x
  2. Step 2: Convert to fraction form
    647,000.69/892,927.38 = 388,961.17/x
  3. Step 3: Cross multiply
    647,000.69x = 892,927.38 × 388,961.17
  4. Step 4: Simplify right side
    647,000.69x = 347,314,076,217.52
  5. Step 5: Solve for x
    x = 347,314,076,217.52/647,000.69
  6. Step 6: Final answer
    x = 536,806.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.