Home / 2,631.69-3,940.65-1,811.70

Finding the Fourth Proportional to 2,631.69, 3,940.65 and 1,811.70

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Solution

The fourth proportional to 2,631.69, 3,940.65 and 1,811.70 is: 2,712.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.69 : 3,940.65 = 1,811.70 : x
  2. Step 2: Convert to fraction form
    2,631.69/3,940.65 = 1,811.70/x
  3. Step 3: Cross multiply
    2,631.69x = 3,940.65 × 1,811.70
  4. Step 4: Simplify right side
    2,631.69x = 7,139,275.61
  5. Step 5: Solve for x
    x = 7,139,275.61/2,631.69
  6. Step 6: Final answer
    x = 2,712.81

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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.