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Finding the Fourth Proportional to 324,747.20, 485,808.60 and 280,861.40

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Solution

The fourth proportional to 324,747.20, 485,808.60 and 280,861.40 is: 420,157.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,747.20 : 485,808.60 = 280,861.40 : x
  2. Step 2: Convert to fraction form
    324,747.20/485,808.60 = 280,861.40/x
  3. Step 3: Cross multiply
    324,747.20x = 485,808.60 × 280,861.40
  4. Step 4: Simplify right side
    324,747.20x = 136,444,883,528.04
  5. Step 5: Solve for x
    x = 136,444,883,528.04/324,747.20
  6. Step 6: Final answer
    x = 420,157.23

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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.