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Finding the Fourth Proportional to 464.08, 640.12 and 316.64

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Solution

The fourth proportional to 464.08, 640.12 and 316.64 is: 436.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.08 : 640.12 = 316.64 : x
  2. Step 2: Convert to fraction form
    464.08/640.12 = 316.64/x
  3. Step 3: Cross multiply
    464.08x = 640.12 × 316.64
  4. Step 4: Simplify right side
    464.08x = 202,687.60
  5. Step 5: Solve for x
    x = 202,687.60/464.08
  6. Step 6: Final answer
    x = 436.75

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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.