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Finding the Fourth Proportional to 513.65, 770.11 and 239.59

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Solution

The fourth proportional to 513.65, 770.11 and 239.59 is: 359.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.65 : 770.11 = 239.59 : x
  2. Step 2: Convert to fraction form
    513.65/770.11 = 239.59/x
  3. Step 3: Cross multiply
    513.65x = 770.11 × 239.59
  4. Step 4: Simplify right side
    513.65x = 184,511.02
  5. Step 5: Solve for x
    x = 184,511.02/513.65
  6. Step 6: Final answer
    x = 359.22

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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.