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Finding the Fourth Proportional to 211.80, 295.80 and 211.80

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Solution

The fourth proportional to 211.80, 295.80 and 211.80 is: 295.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.80 : 295.80 = 211.80 : x
  2. Step 2: Convert to fraction form
    211.80/295.80 = 211.80/x
  3. Step 3: Cross multiply
    211.80x = 295.80 × 211.80
  4. Step 4: Simplify right side
    211.80x = 62,650.44
  5. Step 5: Solve for x
    x = 62,650.44/211.80
  6. Step 6: Final answer
    x = 295.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.