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Finding the Fourth Proportional to 513.73, 770.28 and 239.68

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Solution

The fourth proportional to 513.73, 770.28 and 239.68 is: 359.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.73 : 770.28 = 239.68 : x
  2. Step 2: Convert to fraction form
    513.73/770.28 = 239.68/x
  3. Step 3: Cross multiply
    513.73x = 770.28 × 239.68
  4. Step 4: Simplify right side
    513.73x = 184,620.71
  5. Step 5: Solve for x
    x = 184,620.71/513.73
  6. Step 6: Final answer
    x = 359.37

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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.