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Finding the Fourth Proportional to 324,980.64, 486,591.60 and 212,380.32

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Solution

The fourth proportional to 324,980.64, 486,591.60 and 212,380.32 is: 317,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,980.64 : 486,591.60 = 212,380.32 : x
  2. Step 2: Convert to fraction form
    324,980.64/486,591.60 = 212,380.32/x
  3. Step 3: Cross multiply
    324,980.64x = 486,591.60 × 212,380.32
  4. Step 4: Simplify right side
    324,980.64x = 103,342,479,717.31
  5. Step 5: Solve for x
    x = 103,342,479,717.31/324,980.64
  6. Step 6: Final answer
    x = 317,995.80

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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.