Home / 1,789.20-2,683.69-490.57

Finding the Fourth Proportional to 1,789.20, 2,683.69 and 490.57

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Solution

The fourth proportional to 1,789.20, 2,683.69 and 490.57 is: 735.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,789.20 : 2,683.69 = 490.57 : x
  2. Step 2: Convert to fraction form
    1,789.20/2,683.69 = 490.57/x
  3. Step 3: Cross multiply
    1,789.20x = 2,683.69 × 490.57
  4. Step 4: Simplify right side
    1,789.20x = 1,316,537.80
  5. Step 5: Solve for x
    x = 1,316,537.80/1,789.20
  6. Step 6: Final answer
    x = 735.82

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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.