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Finding the Fourth Proportional to 368.45, 508.41 and 211.11

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Solution

The fourth proportional to 368.45, 508.41 and 211.11 is: 291.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.45 : 508.41 = 211.11 : x
  2. Step 2: Convert to fraction form
    368.45/508.41 = 211.11/x
  3. Step 3: Cross multiply
    368.45x = 508.41 × 211.11
  4. Step 4: Simplify right side
    368.45x = 107,330.44
  5. Step 5: Solve for x
    x = 107,330.44/368.45
  6. Step 6: Final answer
    x = 291.31

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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.