Home / 3,076.20-4,610.70-1,321.20

Finding the Fourth Proportional to 3,076.20, 4,610.70 and 1,321.20

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Solution

The fourth proportional to 3,076.20, 4,610.70 and 1,321.20 is: 1,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,076.20 : 4,610.70 = 1,321.20 : x
  2. Step 2: Convert to fraction form
    3,076.20/4,610.70 = 1,321.20/x
  3. Step 3: Cross multiply
    3,076.20x = 4,610.70 × 1,321.20
  4. Step 4: Simplify right side
    3,076.20x = 6,091,656.84
  5. Step 5: Solve for x
    x = 6,091,656.84/3,076.20
  6. Step 6: Final answer
    x = 1,980.25

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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.