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Finding the Fourth Proportional to 3,889.72, 5,834.55 and 1,292.65

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Solution

The fourth proportional to 3,889.72, 5,834.55 and 1,292.65 is: 1,938.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.72 : 5,834.55 = 1,292.65 : x
  2. Step 2: Convert to fraction form
    3,889.72/5,834.55 = 1,292.65/x
  3. Step 3: Cross multiply
    3,889.72x = 5,834.55 × 1,292.65
  4. Step 4: Simplify right side
    3,889.72x = 7,542,031.06
  5. Step 5: Solve for x
    x = 7,542,031.06/3,889.72
  6. Step 6: Final answer
    x = 1,938.97

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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.