Home / 2,189.37-3,284.72-1,312.85

Finding the Fourth Proportional to 2,189.37, 3,284.72 and 1,312.85

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Solution

The fourth proportional to 2,189.37, 3,284.72 and 1,312.85 is: 1,969.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189.37 : 3,284.72 = 1,312.85 : x
  2. Step 2: Convert to fraction form
    2,189.37/3,284.72 = 1,312.85/x
  3. Step 3: Cross multiply
    2,189.37x = 3,284.72 × 1,312.85
  4. Step 4: Simplify right side
    2,189.37x = 4,312,321.66
  5. Step 5: Solve for x
    x = 4,312,321.66/2,189.37
  6. Step 6: Final answer
    x = 1,969.66

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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.