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Finding the Fourth Proportional to 1,456.21, 2,183.91 and 578.71

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Solution

The fourth proportional to 1,456.21, 2,183.91 and 578.71 is: 867.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,456.21 : 2,183.91 = 578.71 : x
  2. Step 2: Convert to fraction form
    1,456.21/2,183.91 = 578.71/x
  3. Step 3: Cross multiply
    1,456.21x = 2,183.91 × 578.71
  4. Step 4: Simplify right side
    1,456.21x = 1,263,850.56
  5. Step 5: Solve for x
    x = 1,263,850.56/1,456.21
  6. Step 6: Final answer
    x = 867.90

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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.