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Finding the Fourth Proportional to 1,897.97, 2,619.14 and 1,189.62

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Solution

The fourth proportional to 1,897.97, 2,619.14 and 1,189.62 is: 1,641.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,897.97 : 2,619.14 = 1,189.62 : x
  2. Step 2: Convert to fraction form
    1,897.97/2,619.14 = 1,189.62/x
  3. Step 3: Cross multiply
    1,897.97x = 2,619.14 × 1,189.62
  4. Step 4: Simplify right side
    1,897.97x = 3,115,775.38
  5. Step 5: Solve for x
    x = 3,115,775.38/1,897.97
  6. Step 6: Final answer
    x = 1,641.64

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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.