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Finding the Fourth Proportional to 466.11, 643.22 and 279.49

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Solution

The fourth proportional to 466.11, 643.22 and 279.49 is: 385.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.11 : 643.22 = 279.49 : x
  2. Step 2: Convert to fraction form
    466.11/643.22 = 279.49/x
  3. Step 3: Cross multiply
    466.11x = 643.22 × 279.49
  4. Step 4: Simplify right side
    466.11x = 179,772.16
  5. Step 5: Solve for x
    x = 179,772.16/466.11
  6. Step 6: Final answer
    x = 385.69

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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.