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Finding the Fourth Proportional to 463.21, 638.98 and 313.83

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Solution

The fourth proportional to 463.21, 638.98 and 313.83 is: 432.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.21 : 638.98 = 313.83 : x
  2. Step 2: Convert to fraction form
    463.21/638.98 = 313.83/x
  3. Step 3: Cross multiply
    463.21x = 638.98 × 313.83
  4. Step 4: Simplify right side
    463.21x = 200,531.09
  5. Step 5: Solve for x
    x = 200,531.09/463.21
  6. Step 6: Final answer
    x = 432.92

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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.