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Finding the Fourth Proportional to 464.45, 640.91 and 254.63

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Solution

The fourth proportional to 464.45, 640.91 and 254.63 is: 351.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.45 : 640.91 = 254.63 : x
  2. Step 2: Convert to fraction form
    464.45/640.91 = 254.63/x
  3. Step 3: Cross multiply
    464.45x = 640.91 × 254.63
  4. Step 4: Simplify right side
    464.45x = 163,197.15
  5. Step 5: Solve for x
    x = 163,197.15/464.45
  6. Step 6: Final answer
    x = 351.38

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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.