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Finding the Fourth Proportional to 490,887.20, 735,812.40 and 280,071.20

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Solution

The fourth proportional to 490,887.20, 735,812.40 and 280,071.20 is: 419,811.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,887.20 : 735,812.40 = 280,071.20 : x
  2. Step 2: Convert to fraction form
    490,887.20/735,812.40 = 280,071.20/x
  3. Step 3: Cross multiply
    490,887.20x = 735,812.40 × 280,071.20
  4. Step 4: Simplify right side
    490,887.20x = 206,079,861,842.88
  5. Step 5: Solve for x
    x = 206,079,861,842.88/490,887.20
  6. Step 6: Final answer
    x = 419,811.03

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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.