Home / 3,138.26-4,330.91-1,721.99

Finding the Fourth Proportional to 3,138.26, 4,330.91 and 1,721.99

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Solution

The fourth proportional to 3,138.26, 4,330.91 and 1,721.99 is: 2,376.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.26 : 4,330.91 = 1,721.99 : x
  2. Step 2: Convert to fraction form
    3,138.26/4,330.91 = 1,721.99/x
  3. Step 3: Cross multiply
    3,138.26x = 4,330.91 × 1,721.99
  4. Step 4: Simplify right side
    3,138.26x = 7,457,798.84
  5. Step 5: Solve for x
    x = 7,457,798.84/3,138.26
  6. Step 6: Final answer
    x = 2,376.42

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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.