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Finding the Fourth Proportional to 304.18, 419.63 and 221.25

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Solution

The fourth proportional to 304.18, 419.63 and 221.25 is: 305.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.18 : 419.63 = 221.25 : x
  2. Step 2: Convert to fraction form
    304.18/419.63 = 221.25/x
  3. Step 3: Cross multiply
    304.18x = 419.63 × 221.25
  4. Step 4: Simplify right side
    304.18x = 92,842.03
  5. Step 5: Solve for x
    x = 92,842.03/304.18
  6. Step 6: Final answer
    x = 305.22

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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.