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Finding the Fourth Proportional to 513.21, 708.23 and 303.39

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Solution

The fourth proportional to 513.21, 708.23 and 303.39 is: 418.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.21 : 708.23 = 303.39 : x
  2. Step 2: Convert to fraction form
    513.21/708.23 = 303.39/x
  3. Step 3: Cross multiply
    513.21x = 708.23 × 303.39
  4. Step 4: Simplify right side
    513.21x = 214,869.90
  5. Step 5: Solve for x
    x = 214,869.90/513.21
  6. Step 6: Final answer
    x = 418.68

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Double scale
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1.5x scale

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.