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Finding the Fourth Proportional to 464.96, 641.64 and 255.15

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Solution

The fourth proportional to 464.96, 641.64 and 255.15 is: 352.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.96 : 641.64 = 255.15 : x
  2. Step 2: Convert to fraction form
    464.96/641.64 = 255.15/x
  3. Step 3: Cross multiply
    464.96x = 641.64 × 255.15
  4. Step 4: Simplify right side
    464.96x = 163,714.45
  5. Step 5: Solve for x
    x = 163,714.45/464.96
  6. Step 6: Final answer
    x = 352.11

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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.