Home / 1,897.95-2,619.05-1,189.77

Finding the Fourth Proportional to 1,897.95, 2,619.05 and 1,189.77

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Solution

The fourth proportional to 1,897.95, 2,619.05 and 1,189.77 is: 1,641.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,897.95 : 2,619.05 = 1,189.77 : x
  2. Step 2: Convert to fraction form
    1,897.95/2,619.05 = 1,189.77/x
  3. Step 3: Cross multiply
    1,897.95x = 2,619.05 × 1,189.77
  4. Step 4: Simplify right side
    1,897.95x = 3,116,067.12
  5. Step 5: Solve for x
    x = 3,116,067.12/1,897.95
  6. Step 6: Final answer
    x = 1,641.81

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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.