Home / 1,431.12-2,146.72-650.69

Finding the Fourth Proportional to 1,431.12, 2,146.72 and 650.69

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Solution

The fourth proportional to 1,431.12, 2,146.72 and 650.69 is: 976.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.12 : 2,146.72 = 650.69 : x
  2. Step 2: Convert to fraction form
    1,431.12/2,146.72 = 650.69/x
  3. Step 3: Cross multiply
    1,431.12x = 2,146.72 × 650.69
  4. Step 4: Simplify right side
    1,431.12x = 1,396,849.24
  5. Step 5: Solve for x
    x = 1,396,849.24/1,431.12
  6. Step 6: Final answer
    x = 976.05

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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.