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Finding the Fourth Proportional to 513.26, 770.07 and 281.86

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Solution

The fourth proportional to 513.26, 770.07 and 281.86 is: 422.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.26 : 770.07 = 281.86 : x
  2. Step 2: Convert to fraction form
    513.26/770.07 = 281.86/x
  3. Step 3: Cross multiply
    513.26x = 770.07 × 281.86
  4. Step 4: Simplify right side
    513.26x = 217,050.01
  5. Step 5: Solve for x
    x = 217,050.01/513.26
  6. Step 6: Final answer
    x = 422.88

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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.