Home / 2,891.08-3,989.86-1,711.88

Finding the Fourth Proportional to 2,891.08, 3,989.86 and 1,711.88

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Solution

The fourth proportional to 2,891.08, 3,989.86 and 1,711.88 is: 2,362.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.08 : 3,989.86 = 1,711.88 : x
  2. Step 2: Convert to fraction form
    2,891.08/3,989.86 = 1,711.88/x
  3. Step 3: Cross multiply
    2,891.08x = 3,989.86 × 1,711.88
  4. Step 4: Simplify right side
    2,891.08x = 6,830,161.54
  5. Step 5: Solve for x
    x = 6,830,161.54/2,891.08
  6. Step 6: Final answer
    x = 2,362.49

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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.