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Finding the Fourth Proportional to 304.08, 419.40 and 205.80

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Solution

The fourth proportional to 304.08, 419.40 and 205.80 is: 283.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.08 : 419.40 = 205.80 : x
  2. Step 2: Convert to fraction form
    304.08/419.40 = 205.80/x
  3. Step 3: Cross multiply
    304.08x = 419.40 × 205.80
  4. Step 4: Simplify right side
    304.08x = 86,312.52
  5. Step 5: Solve for x
    x = 86,312.52/304.08
  6. Step 6: Final answer
    x = 283.85

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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.