Home / 1,399.43-2,107.48-1,219.01

Finding the Fourth Proportional to 1,399.43, 2,107.48 and 1,219.01

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Solution

The fourth proportional to 1,399.43, 2,107.48 and 1,219.01 is: 1,835.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.43 : 2,107.48 = 1,219.01 : x
  2. Step 2: Convert to fraction form
    1,399.43/2,107.48 = 1,219.01/x
  3. Step 3: Cross multiply
    1,399.43x = 2,107.48 × 1,219.01
  4. Step 4: Simplify right side
    1,399.43x = 2,569,039.19
  5. Step 5: Solve for x
    x = 2,569,039.19/1,399.43
  6. Step 6: Final answer
    x = 1,835.78

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.