Home / 3,977.36-5,487.72-2,405.36

Finding the Fourth Proportional to 3,977.36, 5,487.72 and 2,405.36

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Solution

The fourth proportional to 3,977.36, 5,487.72 and 2,405.36 is: 3,318.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,977.36 : 5,487.72 = 2,405.36 : x
  2. Step 2: Convert to fraction form
    3,977.36/5,487.72 = 2,405.36/x
  3. Step 3: Cross multiply
    3,977.36x = 5,487.72 × 2,405.36
  4. Step 4: Simplify right side
    3,977.36x = 13,199,942.18
  5. Step 5: Solve for x
    x = 13,199,942.18/3,977.36
  6. Step 6: Final answer
    x = 3,318.77

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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.