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Finding the Fourth Proportional to 466.32, 643.50 and 279.70

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Solution

The fourth proportional to 466.32, 643.50 and 279.70 is: 385.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.32 : 643.50 = 279.70 : x
  2. Step 2: Convert to fraction form
    466.32/643.50 = 279.70/x
  3. Step 3: Cross multiply
    466.32x = 643.50 × 279.70
  4. Step 4: Simplify right side
    466.32x = 179,986.95
  5. Step 5: Solve for x
    x = 179,986.95/466.32
  6. Step 6: Final answer
    x = 385.97

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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.