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Finding the Fourth Proportional to 484,321.26, 668,352.90 and 280,380.81

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Solution

The fourth proportional to 484,321.26, 668,352.90 and 280,380.81 is: 386,919.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,321.26 : 668,352.90 = 280,380.81 : x
  2. Step 2: Convert to fraction form
    484,321.26/668,352.90 = 280,380.81/x
  3. Step 3: Cross multiply
    484,321.26x = 668,352.90 × 280,380.81
  4. Step 4: Simplify right side
    484,321.26x = 187,393,327,467.85
  5. Step 5: Solve for x
    x = 187,393,327,467.85/484,321.26
  6. Step 6: Final answer
    x = 386,919.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.