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Finding the Fourth Proportional to 464.70, 638.58 and 443.28

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Solution

The fourth proportional to 464.70, 638.58 and 443.28 is: 609.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.70 : 638.58 = 443.28 : x
  2. Step 2: Convert to fraction form
    464.70/638.58 = 443.28/x
  3. Step 3: Cross multiply
    464.70x = 638.58 × 443.28
  4. Step 4: Simplify right side
    464.70x = 283,069.74
  5. Step 5: Solve for x
    x = 283,069.74/464.70
  6. Step 6: Final answer
    x = 609.15

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.