Home / 1,431.08-2,146.24-650.80

Finding the Fourth Proportional to 1,431.08, 2,146.24 and 650.80

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Solution

The fourth proportional to 1,431.08, 2,146.24 and 650.80 is: 976.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.08 : 2,146.24 = 650.80 : x
  2. Step 2: Convert to fraction form
    1,431.08/2,146.24 = 650.80/x
  3. Step 3: Cross multiply
    1,431.08x = 2,146.24 × 650.80
  4. Step 4: Simplify right side
    1,431.08x = 1,396,772.99
  5. Step 5: Solve for x
    x = 1,396,772.99/1,431.08
  6. Step 6: Final answer
    x = 976.03

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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.