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Finding the Fourth Proportional to 543,640.40, 816,335.40 and 366,930.80

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Solution

The fourth proportional to 543,640.40, 816,335.40 and 366,930.80 is: 550,986.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,640.40 : 816,335.40 = 366,930.80 : x
  2. Step 2: Convert to fraction form
    543,640.40/816,335.40 = 366,930.80/x
  3. Step 3: Cross multiply
    543,640.40x = 816,335.40 × 366,930.80
  4. Step 4: Simplify right side
    543,640.40x = 299,538,601,390.32
  5. Step 5: Solve for x
    x = 299,538,601,390.32/543,640.40
  6. Step 6: Final answer
    x = 550,986.65

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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.