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Finding the Fourth Proportional to 368.89, 509.09 and 211.54

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Solution

The fourth proportional to 368.89, 509.09 and 211.54 is: 291.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.89 : 509.09 = 211.54 : x
  2. Step 2: Convert to fraction form
    368.89/509.09 = 211.54/x
  3. Step 3: Cross multiply
    368.89x = 509.09 × 211.54
  4. Step 4: Simplify right side
    368.89x = 107,693.43
  5. Step 5: Solve for x
    x = 107,693.43/368.89
  6. Step 6: Final answer
    x = 291.94

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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.