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Finding the Fourth Proportional to 304.64, 419.68 and 239.04

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Solution

The fourth proportional to 304.64, 419.68 and 239.04 is: 329.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.64 : 419.68 = 239.04 : x
  2. Step 2: Convert to fraction form
    304.64/419.68 = 239.04/x
  3. Step 3: Cross multiply
    304.64x = 419.68 × 239.04
  4. Step 4: Simplify right side
    304.64x = 100,320.31
  5. Step 5: Solve for x
    x = 100,320.31/304.64
  6. Step 6: Final answer
    x = 329.31

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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.