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Finding the Fourth Proportional to 513.20, 708.26 and 303.38

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Solution

The fourth proportional to 513.20, 708.26 and 303.38 is: 418.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.20 : 708.26 = 303.38 : x
  2. Step 2: Convert to fraction form
    513.20/708.26 = 303.38/x
  3. Step 3: Cross multiply
    513.20x = 708.26 × 303.38
  4. Step 4: Simplify right side
    513.20x = 214,866.86
  5. Step 5: Solve for x
    x = 214,866.86/513.20
  6. Step 6: Final answer
    x = 418.68

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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.