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Finding the Fourth Proportional to 464.22, 639.96 and 316.60

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Solution

The fourth proportional to 464.22, 639.96 and 316.60 is: 436.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.22 : 639.96 = 316.60 : x
  2. Step 2: Convert to fraction form
    464.22/639.96 = 316.60/x
  3. Step 3: Cross multiply
    464.22x = 639.96 × 316.60
  4. Step 4: Simplify right side
    464.22x = 202,611.34
  5. Step 5: Solve for x
    x = 202,611.34/464.22
  6. Step 6: Final answer
    x = 436.46

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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.