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Finding the Fourth Proportional to 339.98, 468.96 and 208.76

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Solution

The fourth proportional to 339.98, 468.96 and 208.76 is: 287.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.98 : 468.96 = 208.76 : x
  2. Step 2: Convert to fraction form
    339.98/468.96 = 208.76/x
  3. Step 3: Cross multiply
    339.98x = 468.96 × 208.76
  4. Step 4: Simplify right side
    339.98x = 97,900.09
  5. Step 5: Solve for x
    x = 97,900.09/339.98
  6. Step 6: Final answer
    x = 287.96

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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.