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Finding the Fourth Proportional to 490,720.20, 735,561.90 and 279,904.20

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Solution

The fourth proportional to 490,720.20, 735,561.90 and 279,904.20 is: 419,560.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,720.20 : 735,561.90 = 279,904.20 : x
  2. Step 2: Convert to fraction form
    490,720.20/735,561.90 = 279,904.20/x
  3. Step 3: Cross multiply
    490,720.20x = 735,561.90 × 279,904.20
  4. Step 4: Simplify right side
    490,720.20x = 205,886,865,169.98
  5. Step 5: Solve for x
    x = 205,886,865,169.98/490,720.20
  6. Step 6: Final answer
    x = 419,560.61

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1.5x scale

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.