Home / 3,168.78-4,750.59-1,321.28

Finding the Fourth Proportional to 3,168.78, 4,750.59 and 1,321.28

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Solution

The fourth proportional to 3,168.78, 4,750.59 and 1,321.28 is: 1,980.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,168.78 : 4,750.59 = 1,321.28 : x
  2. Step 2: Convert to fraction form
    3,168.78/4,750.59 = 1,321.28/x
  3. Step 3: Cross multiply
    3,168.78x = 4,750.59 × 1,321.28
  4. Step 4: Simplify right side
    3,168.78x = 6,276,859.56
  5. Step 5: Solve for x
    x = 6,276,859.56/3,168.78
  6. Step 6: Final answer
    x = 1,980.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.