Home / 2,157.20-2,976.94-1,212.96

Finding the Fourth Proportional to 2,157.20, 2,976.94 and 1,212.96

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Solution

The fourth proportional to 2,157.20, 2,976.94 and 1,212.96 is: 1,673.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.20 : 2,976.94 = 1,212.96 : x
  2. Step 2: Convert to fraction form
    2,157.20/2,976.94 = 1,212.96/x
  3. Step 3: Cross multiply
    2,157.20x = 2,976.94 × 1,212.96
  4. Step 4: Simplify right side
    2,157.20x = 3,610,909.14
  5. Step 5: Solve for x
    x = 3,610,909.14/2,157.20
  6. Step 6: Final answer
    x = 1,673.89

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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.