Home / 3,185-4,395.30-1,787.78

Finding the Fourth Proportional to 3,185, 4,395.30 and 1,787.78

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Solution

The fourth proportional to 3,185, 4,395.30 and 1,787.78 is: 2,467.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,185 : 4,395.30 = 1,787.78 : x
  2. Step 2: Convert to fraction form
    3,185/4,395.30 = 1,787.78/x
  3. Step 3: Cross multiply
    3,185x = 4,395.30 × 1,787.78
  4. Step 4: Simplify right side
    3,185x = 7,857,829.43
  5. Step 5: Solve for x
    x = 7,857,829.43/3,185
  6. Step 6: Final answer
    x = 2,467.14

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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.