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Finding the Fourth Proportional to 318,841.40, 439,968.57 and 196,314.32

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Solution

The fourth proportional to 318,841.40, 439,968.57 and 196,314.32 is: 270,893.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,841.40 : 439,968.57 = 196,314.32 : x
  2. Step 2: Convert to fraction form
    318,841.40/439,968.57 = 196,314.32/x
  3. Step 3: Cross multiply
    318,841.40x = 439,968.57 × 196,314.32
  4. Step 4: Simplify right side
    318,841.40x = 86,372,130,640.92
  5. Step 5: Solve for x
    x = 86,372,130,640.92/318,841.40
  6. Step 6: Final answer
    x = 270,893.71

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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.