Home / 3,047.38-4,205.57-1,721.21

Finding the Fourth Proportional to 3,047.38, 4,205.57 and 1,721.21

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Solution

The fourth proportional to 3,047.38, 4,205.57 and 1,721.21 is: 2,375.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,047.38 : 4,205.57 = 1,721.21 : x
  2. Step 2: Convert to fraction form
    3,047.38/4,205.57 = 1,721.21/x
  3. Step 3: Cross multiply
    3,047.38x = 4,205.57 × 1,721.21
  4. Step 4: Simplify right side
    3,047.38x = 7,238,639.51
  5. Step 5: Solve for x
    x = 7,238,639.51/3,047.38
  6. Step 6: Final answer
    x = 2,375.37

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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.