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Finding the Fourth Proportional to 464.38, 641.02 and 398.62

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Solution

The fourth proportional to 464.38, 641.02 and 398.62 is: 550.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.38 : 641.02 = 398.62 : x
  2. Step 2: Convert to fraction form
    464.38/641.02 = 398.62/x
  3. Step 3: Cross multiply
    464.38x = 641.02 × 398.62
  4. Step 4: Simplify right side
    464.38x = 255,523.39
  5. Step 5: Solve for x
    x = 255,523.39/464.38
  6. Step 6: Final answer
    x = 550.25

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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.