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Finding the Fourth Proportional to 1,893.78, 2,841.21 and 1,621.62

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Solution

The fourth proportional to 1,893.78, 2,841.21 and 1,621.62 is: 2,432.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,893.78 : 2,841.21 = 1,621.62 : x
  2. Step 2: Convert to fraction form
    1,893.78/2,841.21 = 1,621.62/x
  3. Step 3: Cross multiply
    1,893.78x = 2,841.21 × 1,621.62
  4. Step 4: Simplify right side
    1,893.78x = 4,607,362.96
  5. Step 5: Solve for x
    x = 4,607,362.96/1,893.78
  6. Step 6: Final answer
    x = 2,432.89

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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.