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Finding the Fourth Proportional to 398.64, 600.69 and 328.08

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Solution

The fourth proportional to 398.64, 600.69 and 328.08 is: 494.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.64 : 600.69 = 328.08 : x
  2. Step 2: Convert to fraction form
    398.64/600.69 = 328.08/x
  3. Step 3: Cross multiply
    398.64x = 600.69 × 328.08
  4. Step 4: Simplify right side
    398.64x = 197,074.38
  5. Step 5: Solve for x
    x = 197,074.38/398.64
  6. Step 6: Final answer
    x = 494.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.