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Finding the Fourth Proportional to 339.47, 468.30 and 199.50

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Solution

The fourth proportional to 339.47, 468.30 and 199.50 is: 275.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.47 : 468.30 = 199.50 : x
  2. Step 2: Convert to fraction form
    339.47/468.30 = 199.50/x
  3. Step 3: Cross multiply
    339.47x = 468.30 × 199.50
  4. Step 4: Simplify right side
    339.47x = 93,425.85
  5. Step 5: Solve for x
    x = 93,425.85/339.47
  6. Step 6: Final answer
    x = 275.21

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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.