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Finding the Fourth Proportional to 339.16, 509.73 and 281.74

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Solution

The fourth proportional to 339.16, 509.73 and 281.74 is: 423.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.16 : 509.73 = 281.74 : x
  2. Step 2: Convert to fraction form
    339.16/509.73 = 281.74/x
  3. Step 3: Cross multiply
    339.16x = 509.73 × 281.74
  4. Step 4: Simplify right side
    339.16x = 143,611.33
  5. Step 5: Solve for x
    x = 143,611.33/339.16
  6. Step 6: Final answer
    x = 423.43

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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.