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Finding the Fourth Proportional to 466.05, 642.69 and 279.57

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Solution

The fourth proportional to 466.05, 642.69 and 279.57 is: 385.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.05 : 642.69 = 279.57 : x
  2. Step 2: Convert to fraction form
    466.05/642.69 = 279.57/x
  3. Step 3: Cross multiply
    466.05x = 642.69 × 279.57
  4. Step 4: Simplify right side
    466.05x = 179,676.84
  5. Step 5: Solve for x
    x = 179,676.84/466.05
  6. Step 6: Final answer
    x = 385.53

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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.