Home / 1,628.39-2,443.80-1,080.38

Finding the Fourth Proportional to 1,628.39, 2,443.80 and 1,080.38

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Solution

The fourth proportional to 1,628.39, 2,443.80 and 1,080.38 is: 1,621.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.39 : 2,443.80 = 1,080.38 : x
  2. Step 2: Convert to fraction form
    1,628.39/2,443.80 = 1,080.38/x
  3. Step 3: Cross multiply
    1,628.39x = 2,443.80 × 1,080.38
  4. Step 4: Simplify right side
    1,628.39x = 2,640,232.64
  5. Step 5: Solve for x
    x = 2,640,232.64/1,628.39
  6. Step 6: Final answer
    x = 1,621.38

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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.