Home / 4,780.31-7,171.36-2,147.75

Finding the Fourth Proportional to 4,780.31, 7,171.36 and 2,147.75

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Solution

The fourth proportional to 4,780.31, 7,171.36 and 2,147.75 is: 3,222.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,780.31 : 7,171.36 = 2,147.75 : x
  2. Step 2: Convert to fraction form
    4,780.31/7,171.36 = 2,147.75/x
  3. Step 3: Cross multiply
    4,780.31x = 7,171.36 × 2,147.75
  4. Step 4: Simplify right side
    4,780.31x = 15,402,288.44
  5. Step 5: Solve for x
    x = 15,402,288.44/4,780.31
  6. Step 6: Final answer
    x = 3,222.03

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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.