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Finding the Fourth Proportional to 2,889.86, 3,988.54 and 1,711.52

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Solution

The fourth proportional to 2,889.86, 3,988.54 and 1,711.52 is: 2,362.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.86 : 3,988.54 = 1,711.52 : x
  2. Step 2: Convert to fraction form
    2,889.86/3,988.54 = 1,711.52/x
  3. Step 3: Cross multiply
    2,889.86x = 3,988.54 × 1,711.52
  4. Step 4: Simplify right side
    2,889.86x = 6,826,465.98
  5. Step 5: Solve for x
    x = 6,826,465.98/2,889.86
  6. Step 6: Final answer
    x = 2,362.21

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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.