Home / 2,147.21-3,218.08-914.29

Finding the Fourth Proportional to 2,147.21, 3,218.08 and 914.29

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Solution

The fourth proportional to 2,147.21, 3,218.08 and 914.29 is: 1,370.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,147.21 : 3,218.08 = 914.29 : x
  2. Step 2: Convert to fraction form
    2,147.21/3,218.08 = 914.29/x
  3. Step 3: Cross multiply
    2,147.21x = 3,218.08 × 914.29
  4. Step 4: Simplify right side
    2,147.21x = 2,942,258.36
  5. Step 5: Solve for x
    x = 2,942,258.36/2,147.21
  6. Step 6: Final answer
    x = 1,370.27

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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.