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Finding the Fourth Proportional to 1,322.21, 1,825.62 and 1,008.02

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Solution

The fourth proportional to 1,322.21, 1,825.62 and 1,008.02 is: 1,391.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.21 : 1,825.62 = 1,008.02 : x
  2. Step 2: Convert to fraction form
    1,322.21/1,825.62 = 1,008.02/x
  3. Step 3: Cross multiply
    1,322.21x = 1,825.62 × 1,008.02
  4. Step 4: Simplify right side
    1,322.21x = 1,840,261.47
  5. Step 5: Solve for x
    x = 1,840,261.47/1,322.21
  6. Step 6: Final answer
    x = 1,391.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.