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Finding the Fourth Proportional to 339.21, 506.21 and 302.76

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Solution

The fourth proportional to 339.21, 506.21 and 302.76 is: 451.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.21 : 506.21 = 302.76 : x
  2. Step 2: Convert to fraction form
    339.21/506.21 = 302.76/x
  3. Step 3: Cross multiply
    339.21x = 506.21 × 302.76
  4. Step 4: Simplify right side
    339.21x = 153,260.14
  5. Step 5: Solve for x
    x = 153,260.14/339.21
  6. Step 6: Final answer
    x = 451.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.