Home / 3,989.31-5,983.96-1,216

Finding the Fourth Proportional to 3,989.31, 5,983.96 and 1,216

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Solution

The fourth proportional to 3,989.31, 5,983.96 and 1,216 is: 1,824.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.31 : 5,983.96 = 1,216 : x
  2. Step 2: Convert to fraction form
    3,989.31/5,983.96 = 1,216/x
  3. Step 3: Cross multiply
    3,989.31x = 5,983.96 × 1,216
  4. Step 4: Simplify right side
    3,989.31x = 7,276,495.36
  5. Step 5: Solve for x
    x = 7,276,495.36/3,989.31
  6. Step 6: Final answer
    x = 1,824.00

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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.