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Finding the Fourth Proportional to 513.46, 708.46 and 303.64

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Solution

The fourth proportional to 513.46, 708.46 and 303.64 is: 418.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.46 : 708.46 = 303.64 : x
  2. Step 2: Convert to fraction form
    513.46/708.46 = 303.64/x
  3. Step 3: Cross multiply
    513.46x = 708.46 × 303.64
  4. Step 4: Simplify right side
    513.46x = 215,118.25
  5. Step 5: Solve for x
    x = 215,118.25/513.46
  6. Step 6: Final answer
    x = 418.96

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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.