Home / 3,005.72-4,147.49-1,679.21

Finding the Fourth Proportional to 3,005.72, 4,147.49 and 1,679.21

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Solution

The fourth proportional to 3,005.72, 4,147.49 and 1,679.21 is: 2,317.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,005.72 : 4,147.49 = 1,679.21 : x
  2. Step 2: Convert to fraction form
    3,005.72/4,147.49 = 1,679.21/x
  3. Step 3: Cross multiply
    3,005.72x = 4,147.49 × 1,679.21
  4. Step 4: Simplify right side
    3,005.72x = 6,964,506.68
  5. Step 5: Solve for x
    x = 6,964,506.68/3,005.72
  6. Step 6: Final answer
    x = 2,317.08

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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.