Home / 1,639.26-2,261.55-1,080.01

Finding the Fourth Proportional to 1,639.26, 2,261.55 and 1,080.01

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Solution

The fourth proportional to 1,639.26, 2,261.55 and 1,080.01 is: 1,490.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.26 : 2,261.55 = 1,080.01 : x
  2. Step 2: Convert to fraction form
    1,639.26/2,261.55 = 1,080.01/x
  3. Step 3: Cross multiply
    1,639.26x = 2,261.55 × 1,080.01
  4. Step 4: Simplify right side
    1,639.26x = 2,442,496.62
  5. Step 5: Solve for x
    x = 2,442,496.62/1,639.26
  6. Step 6: Final answer
    x = 1,490.00

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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.