Home / 3,908.40-5,862.66-1,311.36

Finding the Fourth Proportional to 3,908.40, 5,862.66 and 1,311.36

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Solution

The fourth proportional to 3,908.40, 5,862.66 and 1,311.36 is: 1,967.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.40 : 5,862.66 = 1,311.36 : x
  2. Step 2: Convert to fraction form
    3,908.40/5,862.66 = 1,311.36/x
  3. Step 3: Cross multiply
    3,908.40x = 5,862.66 × 1,311.36
  4. Step 4: Simplify right side
    3,908.40x = 7,688,057.82
  5. Step 5: Solve for x
    x = 7,688,057.82/3,908.40
  6. Step 6: Final answer
    x = 1,967.06

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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.