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Finding the Fourth Proportional to 3,889.48, 5,830.62 and 1,291.96

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Solution

The fourth proportional to 3,889.48, 5,830.62 and 1,291.96 is: 1,936.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.48 : 5,830.62 = 1,291.96 : x
  2. Step 2: Convert to fraction form
    3,889.48/5,830.62 = 1,291.96/x
  3. Step 3: Cross multiply
    3,889.48x = 5,830.62 × 1,291.96
  4. Step 4: Simplify right side
    3,889.48x = 7,532,927.82
  5. Step 5: Solve for x
    x = 7,532,927.82/3,889.48
  6. Step 6: Final answer
    x = 1,936.74

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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.