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Finding the Fourth Proportional to 464.70, 641.34 and 449.58

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Solution

The fourth proportional to 464.70, 641.34 and 449.58 is: 620.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.70 : 641.34 = 449.58 : x
  2. Step 2: Convert to fraction form
    464.70/641.34 = 449.58/x
  3. Step 3: Cross multiply
    464.70x = 641.34 × 449.58
  4. Step 4: Simplify right side
    464.70x = 288,333.64
  5. Step 5: Solve for x
    x = 288,333.64/464.70
  6. Step 6: Final answer
    x = 620.47

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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.