Home / 1,431.03-2,144.64-936.81

Finding the Fourth Proportional to 1,431.03, 2,144.64 and 936.81

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Solution

The fourth proportional to 1,431.03, 2,144.64 and 936.81 is: 1,403.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.03 : 2,144.64 = 936.81 : x
  2. Step 2: Convert to fraction form
    1,431.03/2,144.64 = 936.81/x
  3. Step 3: Cross multiply
    1,431.03x = 2,144.64 × 936.81
  4. Step 4: Simplify right side
    1,431.03x = 2,009,120.20
  5. Step 5: Solve for x
    x = 2,009,120.20/1,431.03
  6. Step 6: Final answer
    x = 1,403.97

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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.