Home / 1,620.68-2,431.22-696.47

Finding the Fourth Proportional to 1,620.68, 2,431.22 and 696.47

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Solution

The fourth proportional to 1,620.68, 2,431.22 and 696.47 is: 1,044.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.68 : 2,431.22 = 696.47 : x
  2. Step 2: Convert to fraction form
    1,620.68/2,431.22 = 696.47/x
  3. Step 3: Cross multiply
    1,620.68x = 2,431.22 × 696.47
  4. Step 4: Simplify right side
    1,620.68x = 1,693,256.15
  5. Step 5: Solve for x
    x = 1,693,256.15/1,620.68
  6. Step 6: Final answer
    x = 1,044.78

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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.