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Finding the Fourth Proportional to 445.43, 666.52 and 262.91

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Solution

The fourth proportional to 445.43, 666.52 and 262.91 is: 393.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.43 : 666.52 = 262.91 : x
  2. Step 2: Convert to fraction form
    445.43/666.52 = 262.91/x
  3. Step 3: Cross multiply
    445.43x = 666.52 × 262.91
  4. Step 4: Simplify right side
    445.43x = 175,234.77
  5. Step 5: Solve for x
    x = 175,234.77/445.43
  6. Step 6: Final answer
    x = 393.41

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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.