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Finding the Fourth Proportional to 445.82, 668.03 and 342.98

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Solution

The fourth proportional to 445.82, 668.03 and 342.98 is: 513.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.82 : 668.03 = 342.98 : x
  2. Step 2: Convert to fraction form
    445.82/668.03 = 342.98/x
  3. Step 3: Cross multiply
    445.82x = 668.03 × 342.98
  4. Step 4: Simplify right side
    445.82x = 229,120.93
  5. Step 5: Solve for x
    x = 229,120.93/445.82
  6. Step 6: Final answer
    x = 513.93

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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.