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Finding the Fourth Proportional to 2,889.68, 3,986.69 and 1,895.51

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Solution

The fourth proportional to 2,889.68, 3,986.69 and 1,895.51 is: 2,615.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.68 : 3,986.69 = 1,895.51 : x
  2. Step 2: Convert to fraction form
    2,889.68/3,986.69 = 1,895.51/x
  3. Step 3: Cross multiply
    2,889.68x = 3,986.69 × 1,895.51
  4. Step 4: Simplify right side
    2,889.68x = 7,556,811.25
  5. Step 5: Solve for x
    x = 7,556,811.25/2,889.68
  6. Step 6: Final answer
    x = 2,615.11

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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.