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Finding the Fourth Proportional to 328.32, 450.90 and 279.18

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Solution

The fourth proportional to 328.32, 450.90 and 279.18 is: 383.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.32 : 450.90 = 279.18 : x
  2. Step 2: Convert to fraction form
    328.32/450.90 = 279.18/x
  3. Step 3: Cross multiply
    328.32x = 450.90 × 279.18
  4. Step 4: Simplify right side
    328.32x = 125,882.26
  5. Step 5: Solve for x
    x = 125,882.26/328.32
  6. Step 6: Final answer
    x = 383.41

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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.