Home / 3,157.80-4,731.46-1,921.47

Finding the Fourth Proportional to 3,157.80, 4,731.46 and 1,921.47

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Solution

The fourth proportional to 3,157.80, 4,731.46 and 1,921.47 is: 2,879.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,157.80 : 4,731.46 = 1,921.47 : x
  2. Step 2: Convert to fraction form
    3,157.80/4,731.46 = 1,921.47/x
  3. Step 3: Cross multiply
    3,157.80x = 4,731.46 × 1,921.47
  4. Step 4: Simplify right side
    3,157.80x = 9,091,358.45
  5. Step 5: Solve for x
    x = 9,091,358.45/3,157.80
  6. Step 6: Final answer
    x = 2,879.02

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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.