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Finding the Fourth Proportional to 422.68, 583.84 and 325.64

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Solution

The fourth proportional to 422.68, 583.84 and 325.64 is: 449.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.68 : 583.84 = 325.64 : x
  2. Step 2: Convert to fraction form
    422.68/583.84 = 325.64/x
  3. Step 3: Cross multiply
    422.68x = 583.84 × 325.64
  4. Step 4: Simplify right side
    422.68x = 190,121.66
  5. Step 5: Solve for x
    x = 190,121.66/422.68
  6. Step 6: Final answer
    x = 449.80

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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.