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Finding the Fourth Proportional to 1,679.49, 2,519.39 and 446.90

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Solution

The fourth proportional to 1,679.49, 2,519.39 and 446.90 is: 670.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.49 : 2,519.39 = 446.90 : x
  2. Step 2: Convert to fraction form
    1,679.49/2,519.39 = 446.90/x
  3. Step 3: Cross multiply
    1,679.49x = 2,519.39 × 446.90
  4. Step 4: Simplify right side
    1,679.49x = 1,125,923.62
  5. Step 5: Solve for x
    x = 1,125,923.62/1,679.49
  6. Step 6: Final answer
    x = 670.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.