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Finding the Fourth Proportional to 2,890.85, 3,989.43 and 1,711.94

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Solution

The fourth proportional to 2,890.85, 3,989.43 and 1,711.94 is: 2,362.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.85 : 3,989.43 = 1,711.94 : x
  2. Step 2: Convert to fraction form
    2,890.85/3,989.43 = 1,711.94/x
  3. Step 3: Cross multiply
    2,890.85x = 3,989.43 × 1,711.94
  4. Step 4: Simplify right side
    2,890.85x = 6,829,644.85
  5. Step 5: Solve for x
    x = 6,829,644.85/2,890.85
  6. Step 6: Final answer
    x = 2,362.51

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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.