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Finding the Fourth Proportional to 220.65, 304.14 and 208.35

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Solution

The fourth proportional to 220.65, 304.14 and 208.35 is: 287.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.65 : 304.14 = 208.35 : x
  2. Step 2: Convert to fraction form
    220.65/304.14 = 208.35/x
  3. Step 3: Cross multiply
    220.65x = 304.14 × 208.35
  4. Step 4: Simplify right side
    220.65x = 63,367.57
  5. Step 5: Solve for x
    x = 63,367.57/220.65
  6. Step 6: Final answer
    x = 287.19

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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.