Home / 2,072.20-3,106.64-1,292.40

Finding the Fourth Proportional to 2,072.20, 3,106.64 and 1,292.40

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Solution

The fourth proportional to 2,072.20, 3,106.64 and 1,292.40 is: 1,937.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.20 : 3,106.64 = 1,292.40 : x
  2. Step 2: Convert to fraction form
    2,072.20/3,106.64 = 1,292.40/x
  3. Step 3: Cross multiply
    2,072.20x = 3,106.64 × 1,292.40
  4. Step 4: Simplify right side
    2,072.20x = 4,015,021.54
  5. Step 5: Solve for x
    x = 4,015,021.54/2,072.20
  6. Step 6: Final answer
    x = 1,937.56

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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.