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Finding the Fourth Proportional to 680,969.50, 939,668.37 and 419,283.25

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Solution

The fourth proportional to 680,969.50, 939,668.37 and 419,283.25 is: 578,568.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,969.50 : 939,668.37 = 419,283.25 : x
  2. Step 2: Convert to fraction form
    680,969.50/939,668.37 = 419,283.25/x
  3. Step 3: Cross multiply
    680,969.50x = 939,668.37 × 419,283.25
  4. Step 4: Simplify right side
    680,969.50x = 393,987,208,095.80
  5. Step 5: Solve for x
    x = 393,987,208,095.80/680,969.50
  6. Step 6: Final answer
    x = 578,568.07

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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.