Home / 2,189.86-3,021.76-1,305.50

Finding the Fourth Proportional to 2,189.86, 3,021.76 and 1,305.50

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Solution

The fourth proportional to 2,189.86, 3,021.76 and 1,305.50 is: 1,801.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.86 : 3,021.76 = 1,305.50 : x
  2. Step 2: Convert to fraction form
    2,189.86/3,021.76 = 1,305.50/x
  3. Step 3: Cross multiply
    2,189.86x = 3,021.76 × 1,305.50
  4. Step 4: Simplify right side
    2,189.86x = 3,944,907.68
  5. Step 5: Solve for x
    x = 3,944,907.68/2,189.86
  6. Step 6: Final answer
    x = 1,801.44

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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.