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Finding the Fourth Proportional to 339.58, 509.27 and 320.95

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Solution

The fourth proportional to 339.58, 509.27 and 320.95 is: 481.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.58 : 509.27 = 320.95 : x
  2. Step 2: Convert to fraction form
    339.58/509.27 = 320.95/x
  3. Step 3: Cross multiply
    339.58x = 509.27 × 320.95
  4. Step 4: Simplify right side
    339.58x = 163,450.21
  5. Step 5: Solve for x
    x = 163,450.21/339.58
  6. Step 6: Final answer
    x = 481.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.