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Finding the Fourth Proportional to 218.70, 301.32 and 206.55

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Solution

The fourth proportional to 218.70, 301.32 and 206.55 is: 284.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.70 : 301.32 = 206.55 : x
  2. Step 2: Convert to fraction form
    218.70/301.32 = 206.55/x
  3. Step 3: Cross multiply
    218.70x = 301.32 × 206.55
  4. Step 4: Simplify right side
    218.70x = 62,237.65
  5. Step 5: Solve for x
    x = 62,237.65/218.70
  6. Step 6: Final answer
    x = 284.58

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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.