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Finding the Fourth Proportional to 464.23, 639.96 and 339.67

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Solution

The fourth proportional to 464.23, 639.96 and 339.67 is: 468.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.23 : 639.96 = 339.67 : x
  2. Step 2: Convert to fraction form
    464.23/639.96 = 339.67/x
  3. Step 3: Cross multiply
    464.23x = 639.96 × 339.67
  4. Step 4: Simplify right side
    464.23x = 217,375.21
  5. Step 5: Solve for x
    x = 217,375.21/464.23
  6. Step 6: Final answer
    x = 468.25

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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.