Home / 3,189.20-4,787.40-1,891.40

Finding the Fourth Proportional to 3,189.20, 4,787.40 and 1,891.40

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Solution

The fourth proportional to 3,189.20, 4,787.40 and 1,891.40 is: 2,839.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.20 : 4,787.40 = 1,891.40 : x
  2. Step 2: Convert to fraction form
    3,189.20/4,787.40 = 1,891.40/x
  3. Step 3: Cross multiply
    3,189.20x = 4,787.40 × 1,891.40
  4. Step 4: Simplify right side
    3,189.20x = 9,054,888.36
  5. Step 5: Solve for x
    x = 9,054,888.36/3,189.20
  6. Step 6: Final answer
    x = 2,839.24

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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.