Home / 1,321.97-1,983.09-397.37

Finding the Fourth Proportional to 1,321.97, 1,983.09 and 397.37

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Solution

The fourth proportional to 1,321.97, 1,983.09 and 397.37 is: 596.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.97 : 1,983.09 = 397.37 : x
  2. Step 2: Convert to fraction form
    1,321.97/1,983.09 = 397.37/x
  3. Step 3: Cross multiply
    1,321.97x = 1,983.09 × 397.37
  4. Step 4: Simplify right side
    1,321.97x = 788,020.47
  5. Step 5: Solve for x
    x = 788,020.47/1,321.97
  6. Step 6: Final answer
    x = 596.10

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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.