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Finding the Fourth Proportional to 279,984.40, 419,976.60 and 210,000.40

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Solution

The fourth proportional to 279,984.40, 419,976.60 and 210,000.40 is: 315,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,984.40 : 419,976.60 = 210,000.40 : x
  2. Step 2: Convert to fraction form
    279,984.40/419,976.60 = 210,000.40/x
  3. Step 3: Cross multiply
    279,984.40x = 419,976.60 × 210,000.40
  4. Step 4: Simplify right side
    279,984.40x = 88,195,253,990.64
  5. Step 5: Solve for x
    x = 88,195,253,990.64/279,984.40
  6. Step 6: Final answer
    x = 315,000.60

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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.