Home / 1,945.40-2,918.62-1,080.32

Finding the Fourth Proportional to 1,945.40, 2,918.62 and 1,080.32

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Solution

The fourth proportional to 1,945.40, 2,918.62 and 1,080.32 is: 1,620.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.40 : 2,918.62 = 1,080.32 : x
  2. Step 2: Convert to fraction form
    1,945.40/2,918.62 = 1,080.32/x
  3. Step 3: Cross multiply
    1,945.40x = 2,918.62 × 1,080.32
  4. Step 4: Simplify right side
    1,945.40x = 3,153,043.56
  5. Step 5: Solve for x
    x = 3,153,043.56/1,945.40
  6. Step 6: Final answer
    x = 1,620.77

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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.