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Finding the Fourth Proportional to 223.56, 307.80 and 211.41

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Solution

The fourth proportional to 223.56, 307.80 and 211.41 is: 291.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.56 : 307.80 = 211.41 : x
  2. Step 2: Convert to fraction form
    223.56/307.80 = 211.41/x
  3. Step 3: Cross multiply
    223.56x = 307.80 × 211.41
  4. Step 4: Simplify right side
    223.56x = 65,072.00
  5. Step 5: Solve for x
    x = 65,072.00/223.56
  6. Step 6: Final answer
    x = 291.07

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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.