Home / 2,489.18-3,733.66-640.30

Finding the Fourth Proportional to 2,489.18, 3,733.66 and 640.30

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Solution

The fourth proportional to 2,489.18, 3,733.66 and 640.30 is: 960.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.18 : 3,733.66 = 640.30 : x
  2. Step 2: Convert to fraction form
    2,489.18/3,733.66 = 640.30/x
  3. Step 3: Cross multiply
    2,489.18x = 3,733.66 × 640.30
  4. Step 4: Simplify right side
    2,489.18x = 2,390,662.50
  5. Step 5: Solve for x
    x = 2,390,662.50/2,489.18
  6. Step 6: Final answer
    x = 960.42

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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.