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Finding the Fourth Proportional to 490,736.80, 736,105.20 and 439,415.20

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Solution

The fourth proportional to 490,736.80, 736,105.20 and 439,415.20 is: 659,122.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,736.80 : 736,105.20 = 439,415.20 : x
  2. Step 2: Convert to fraction form
    490,736.80/736,105.20 = 439,415.20/x
  3. Step 3: Cross multiply
    490,736.80x = 736,105.20 × 439,415.20
  4. Step 4: Simplify right side
    490,736.80x = 323,455,813,679.04
  5. Step 5: Solve for x
    x = 323,455,813,679.04/490,736.80
  6. Step 6: Final answer
    x = 659,122.80

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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.