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Finding the Fourth Proportional to 445.24, 666.24 and 262.72

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Solution

The fourth proportional to 445.24, 666.24 and 262.72 is: 393.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.24 : 666.24 = 262.72 : x
  2. Step 2: Convert to fraction form
    445.24/666.24 = 262.72/x
  3. Step 3: Cross multiply
    445.24x = 666.24 × 262.72
  4. Step 4: Simplify right side
    445.24x = 175,034.57
  5. Step 5: Solve for x
    x = 175,034.57/445.24
  6. Step 6: Final answer
    x = 393.12

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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.