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Finding the Fourth Proportional to 463.53, 638.64 and 305.88

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Solution

The fourth proportional to 463.53, 638.64 and 305.88 is: 421.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.53 : 638.64 = 305.88 : x
  2. Step 2: Convert to fraction form
    463.53/638.64 = 305.88/x
  3. Step 3: Cross multiply
    463.53x = 638.64 × 305.88
  4. Step 4: Simplify right side
    463.53x = 195,347.20
  5. Step 5: Solve for x
    x = 195,347.20/463.53
  6. Step 6: Final answer
    x = 421.44

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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.