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Finding the Fourth Proportional to 513.75, 770.94 and 270.45

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Solution

The fourth proportional to 513.75, 770.94 and 270.45 is: 405.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.75 : 770.94 = 270.45 : x
  2. Step 2: Convert to fraction form
    513.75/770.94 = 270.45/x
  3. Step 3: Cross multiply
    513.75x = 770.94 × 270.45
  4. Step 4: Simplify right side
    513.75x = 208,500.72
  5. Step 5: Solve for x
    x = 208,500.72/513.75
  6. Step 6: Final answer
    x = 405.84

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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.