Home / 1,678.38-2,517.33-445.89

Finding the Fourth Proportional to 1,678.38, 2,517.33 and 445.89

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Solution

The fourth proportional to 1,678.38, 2,517.33 and 445.89 is: 668.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.38 : 2,517.33 = 445.89 : x
  2. Step 2: Convert to fraction form
    1,678.38/2,517.33 = 445.89/x
  3. Step 3: Cross multiply
    1,678.38x = 2,517.33 × 445.89
  4. Step 4: Simplify right side
    1,678.38x = 1,122,452.27
  5. Step 5: Solve for x
    x = 1,122,452.27/1,678.38
  6. Step 6: Final answer
    x = 668.77

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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.