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Finding the Fourth Proportional to 445.79, 668.21 and 342.92

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Solution

The fourth proportional to 445.79, 668.21 and 342.92 is: 514.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.79 : 668.21 = 342.92 : x
  2. Step 2: Convert to fraction form
    445.79/668.21 = 342.92/x
  3. Step 3: Cross multiply
    445.79x = 668.21 × 342.92
  4. Step 4: Simplify right side
    445.79x = 229,137.52
  5. Step 5: Solve for x
    x = 229,137.52/445.79
  6. Step 6: Final answer
    x = 514.01

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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.