Home / 3,138.22-4,330.74-1,721.98

Finding the Fourth Proportional to 3,138.22, 4,330.74 and 1,721.98

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Solution

The fourth proportional to 3,138.22, 4,330.74 and 1,721.98 is: 2,376.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.22 : 4,330.74 = 1,721.98 : x
  2. Step 2: Convert to fraction form
    3,138.22/4,330.74 = 1,721.98/x
  3. Step 3: Cross multiply
    3,138.22x = 4,330.74 × 1,721.98
  4. Step 4: Simplify right side
    3,138.22x = 7,457,447.67
  5. Step 5: Solve for x
    x = 7,457,447.67/3,138.22
  6. Step 6: Final answer
    x = 2,376.33

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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.