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Finding the Fourth Proportional to 1,679.57, 2,519.36 and 446.98

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Solution

The fourth proportional to 1,679.57, 2,519.36 and 446.98 is: 670.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.57 : 2,519.36 = 446.98 : x
  2. Step 2: Convert to fraction form
    1,679.57/2,519.36 = 446.98/x
  3. Step 3: Cross multiply
    1,679.57x = 2,519.36 × 446.98
  4. Step 4: Simplify right side
    1,679.57x = 1,126,107.60
  5. Step 5: Solve for x
    x = 1,126,107.60/1,679.57
  6. Step 6: Final answer
    x = 670.47

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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.