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Finding the Fourth Proportional to 464.59, 640.41 and 316.97

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Solution

The fourth proportional to 464.59, 640.41 and 316.97 is: 436.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.59 : 640.41 = 316.97 : x
  2. Step 2: Convert to fraction form
    464.59/640.41 = 316.97/x
  3. Step 3: Cross multiply
    464.59x = 640.41 × 316.97
  4. Step 4: Simplify right side
    464.59x = 202,990.76
  5. Step 5: Solve for x
    x = 202,990.76/464.59
  6. Step 6: Final answer
    x = 436.92

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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.