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Finding the Fourth Proportional to 208.98, 288.33 and 131.37

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Solution

The fourth proportional to 208.98, 288.33 and 131.37 is: 181.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.98 : 288.33 = 131.37 : x
  2. Step 2: Convert to fraction form
    208.98/288.33 = 131.37/x
  3. Step 3: Cross multiply
    208.98x = 288.33 × 131.37
  4. Step 4: Simplify right side
    208.98x = 37,877.91
  5. Step 5: Solve for x
    x = 37,877.91/208.98
  6. Step 6: Final answer
    x = 181.25

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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.