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Finding the Fourth Proportional to 1,894.86, 2,841 and 661.59

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Solution

The fourth proportional to 1,894.86, 2,841 and 661.59 is: 991.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,894.86 : 2,841 = 661.59 : x
  2. Step 2: Convert to fraction form
    1,894.86/2,841 = 661.59/x
  3. Step 3: Cross multiply
    1,894.86x = 2,841 × 661.59
  4. Step 4: Simplify right side
    1,894.86x = 1,879,587.84
  5. Step 5: Solve for x
    x = 1,879,587.84/1,894.86
  6. Step 6: Final answer
    x = 991.94

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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.