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Finding the Fourth Proportional to 651,668.40, 978,377.40 and 416,055.60

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Solution

The fourth proportional to 651,668.40, 978,377.40 and 416,055.60 is: 624,641.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,668.40 : 978,377.40 = 416,055.60 : x
  2. Step 2: Convert to fraction form
    651,668.40/978,377.40 = 416,055.60/x
  3. Step 3: Cross multiply
    651,668.40x = 978,377.40 × 416,055.60
  4. Step 4: Simplify right side
    651,668.40x = 407,059,396,183.44
  5. Step 5: Solve for x
    x = 407,059,396,183.44/651,668.40
  6. Step 6: Final answer
    x = 624,641.91

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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.