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Finding the Fourth Proportional to 339.28, 468.28 and 199.46

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Solution

The fourth proportional to 339.28, 468.28 and 199.46 is: 275.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.28 : 468.28 = 199.46 : x
  2. Step 2: Convert to fraction form
    339.28/468.28 = 199.46/x
  3. Step 3: Cross multiply
    339.28x = 468.28 × 199.46
  4. Step 4: Simplify right side
    339.28x = 93,403.13
  5. Step 5: Solve for x
    x = 93,403.13/339.28
  6. Step 6: Final answer
    x = 275.30

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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.