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Finding the Fourth Proportional to 488.82, 674.51 and 279.03

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Solution

The fourth proportional to 488.82, 674.51 and 279.03 is: 385.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.82 : 674.51 = 279.03 : x
  2. Step 2: Convert to fraction form
    488.82/674.51 = 279.03/x
  3. Step 3: Cross multiply
    488.82x = 674.51 × 279.03
  4. Step 4: Simplify right side
    488.82x = 188,207.13
  5. Step 5: Solve for x
    x = 188,207.13/488.82
  6. Step 6: Final answer
    x = 385.02

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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.