Home / 3,261.30-4,891.99-921.36

Finding the Fourth Proportional to 3,261.30, 4,891.99 and 921.36

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Solution

The fourth proportional to 3,261.30, 4,891.99 and 921.36 is: 1,382.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,261.30 : 4,891.99 = 921.36 : x
  2. Step 2: Convert to fraction form
    3,261.30/4,891.99 = 921.36/x
  3. Step 3: Cross multiply
    3,261.30x = 4,891.99 × 921.36
  4. Step 4: Simplify right side
    3,261.30x = 4,507,283.91
  5. Step 5: Solve for x
    x = 4,507,283.91/3,261.30
  6. Step 6: Final answer
    x = 1,382.05

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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.