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Finding the Fourth Proportional to 3,871.67, 5,808.21 and 1,409.95

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Solution

The fourth proportional to 3,871.67, 5,808.21 and 1,409.95 is: 2,115.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.67 : 5,808.21 = 1,409.95 : x
  2. Step 2: Convert to fraction form
    3,871.67/5,808.21 = 1,409.95/x
  3. Step 3: Cross multiply
    3,871.67x = 5,808.21 × 1,409.95
  4. Step 4: Simplify right side
    3,871.67x = 8,189,249.60
  5. Step 5: Solve for x
    x = 8,189,249.60/3,871.67
  6. Step 6: Final answer
    x = 2,115.17

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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.