Home / 3,180.54-4,390.66-2,120.06

Finding the Fourth Proportional to 3,180.54, 4,390.66 and 2,120.06

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Solution

The fourth proportional to 3,180.54, 4,390.66 and 2,120.06 is: 2,926.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.54 : 4,390.66 = 2,120.06 : x
  2. Step 2: Convert to fraction form
    3,180.54/4,390.66 = 2,120.06/x
  3. Step 3: Cross multiply
    3,180.54x = 4,390.66 × 2,120.06
  4. Step 4: Simplify right side
    3,180.54x = 9,308,462.64
  5. Step 5: Solve for x
    x = 9,308,462.64/3,180.54
  6. Step 6: Final answer
    x = 2,926.69

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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.