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Finding the Fourth Proportional to 464.54, 641.82 and 354.58

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Solution

The fourth proportional to 464.54, 641.82 and 354.58 is: 489.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.54 : 641.82 = 354.58 : x
  2. Step 2: Convert to fraction form
    464.54/641.82 = 354.58/x
  3. Step 3: Cross multiply
    464.54x = 641.82 × 354.58
  4. Step 4: Simplify right side
    464.54x = 227,576.26
  5. Step 5: Solve for x
    x = 227,576.26/464.54
  6. Step 6: Final answer
    x = 489.90

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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.