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Finding the Fourth Proportional to 1,322.29, 1,983.56 and 385.26

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Solution

The fourth proportional to 1,322.29, 1,983.56 and 385.26 is: 577.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.29 : 1,983.56 = 385.26 : x
  2. Step 2: Convert to fraction form
    1,322.29/1,983.56 = 385.26/x
  3. Step 3: Cross multiply
    1,322.29x = 1,983.56 × 385.26
  4. Step 4: Simplify right side
    1,322.29x = 764,186.33
  5. Step 5: Solve for x
    x = 764,186.33/1,322.29
  6. Step 6: Final answer
    x = 577.93

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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.