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Finding the Fourth Proportional to 303.98, 419.61 and 205.78

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Solution

The fourth proportional to 303.98, 419.61 and 205.78 is: 284.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.98 : 419.61 = 205.78 : x
  2. Step 2: Convert to fraction form
    303.98/419.61 = 205.78/x
  3. Step 3: Cross multiply
    303.98x = 419.61 × 205.78
  4. Step 4: Simplify right side
    303.98x = 86,347.35
  5. Step 5: Solve for x
    x = 86,347.35/303.98
  6. Step 6: Final answer
    x = 284.06

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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.