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Finding the Fourth Proportional to 513.82, 770.55 and 491.14

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Solution

The fourth proportional to 513.82, 770.55 and 491.14 is: 736.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.82 : 770.55 = 491.14 : x
  2. Step 2: Convert to fraction form
    513.82/770.55 = 491.14/x
  3. Step 3: Cross multiply
    513.82x = 770.55 × 491.14
  4. Step 4: Simplify right side
    513.82x = 378,447.93
  5. Step 5: Solve for x
    x = 378,447.93/513.82
  6. Step 6: Final answer
    x = 736.54

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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.