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Finding the Fourth Proportional to 513.13, 769.60 and 239.35

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Solution

The fourth proportional to 513.13, 769.60 and 239.35 is: 358.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.13 : 769.60 = 239.35 : x
  2. Step 2: Convert to fraction form
    513.13/769.60 = 239.35/x
  3. Step 3: Cross multiply
    513.13x = 769.60 × 239.35
  4. Step 4: Simplify right side
    513.13x = 184,203.76
  5. Step 5: Solve for x
    x = 184,203.76/513.13
  6. Step 6: Final answer
    x = 358.98

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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.