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Finding the Fourth Proportional to 680,018.82, 938,368.08 and 393,556.62

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Solution

The fourth proportional to 680,018.82, 938,368.08 and 393,556.62 is: 543,074.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,018.82 : 938,368.08 = 393,556.62 : x
  2. Step 2: Convert to fraction form
    680,018.82/938,368.08 = 393,556.62/x
  3. Step 3: Cross multiply
    680,018.82x = 938,368.08 × 393,556.62
  4. Step 4: Simplify right side
    680,018.82x = 369,300,969,880.69
  5. Step 5: Solve for x
    x = 369,300,969,880.69/680,018.82
  6. Step 6: Final answer
    x = 543,074.63

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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.