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Finding the Fourth Proportional to 493.98, 679.73 and 478.95

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Solution

The fourth proportional to 493.98, 679.73 and 478.95 is: 659.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.98 : 679.73 = 478.95 : x
  2. Step 2: Convert to fraction form
    493.98/679.73 = 478.95/x
  3. Step 3: Cross multiply
    493.98x = 679.73 × 478.95
  4. Step 4: Simplify right side
    493.98x = 325,554.29
  5. Step 5: Solve for x
    x = 325,554.29/493.98
  6. Step 6: Final answer
    x = 659.04

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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.