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Finding the Fourth Proportional to 328.60, 451.37 and 318.88

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Solution

The fourth proportional to 328.60, 451.37 and 318.88 is: 438.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.60 : 451.37 = 318.88 : x
  2. Step 2: Convert to fraction form
    328.60/451.37 = 318.88/x
  3. Step 3: Cross multiply
    328.60x = 451.37 × 318.88
  4. Step 4: Simplify right side
    328.60x = 143,932.87
  5. Step 5: Solve for x
    x = 143,932.87/328.60
  6. Step 6: Final answer
    x = 438.02

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.