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Finding the Fourth Proportional to 5,871.39, 8,102.79 and 3,219

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Solution

The fourth proportional to 5,871.39, 8,102.79 and 3,219 is: 4,442.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,871.39 : 8,102.79 = 3,219 : x
  2. Step 2: Convert to fraction form
    5,871.39/8,102.79 = 3,219/x
  3. Step 3: Cross multiply
    5,871.39x = 8,102.79 × 3,219
  4. Step 4: Simplify right side
    5,871.39x = 26,082,881.01
  5. Step 5: Solve for x
    x = 26,082,881.01/5,871.39
  6. Step 6: Final answer
    x = 4,442.37

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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.