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Finding the Fourth Proportional to 513.38, 708.28 and 303.54

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Solution

The fourth proportional to 513.38, 708.28 and 303.54 is: 418.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.38 : 708.28 = 303.54 : x
  2. Step 2: Convert to fraction form
    513.38/708.28 = 303.54/x
  3. Step 3: Cross multiply
    513.38x = 708.28 × 303.54
  4. Step 4: Simplify right side
    513.38x = 214,991.31
  5. Step 5: Solve for x
    x = 214,991.31/513.38
  6. Step 6: Final answer
    x = 418.78

Related Problems

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.