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Finding the Fourth Proportional to 463.94, 640.01 and 331.18

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Solution

The fourth proportional to 463.94, 640.01 and 331.18 is: 456.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.94 : 640.01 = 331.18 : x
  2. Step 2: Convert to fraction form
    463.94/640.01 = 331.18/x
  3. Step 3: Cross multiply
    463.94x = 640.01 × 331.18
  4. Step 4: Simplify right side
    463.94x = 211,960.14
  5. Step 5: Solve for x
    x = 211,960.14/463.94
  6. Step 6: Final answer
    x = 456.87

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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.