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Finding the Fourth Proportional to 490,446.72, 676,855.68 and 275,596.80

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Solution

The fourth proportional to 490,446.72, 676,855.68 and 275,596.80 is: 380,345.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,446.72 : 676,855.68 = 275,596.80 : x
  2. Step 2: Convert to fraction form
    490,446.72/676,855.68 = 275,596.80/x
  3. Step 3: Cross multiply
    490,446.72x = 676,855.68 × 275,596.80
  4. Step 4: Simplify right side
    490,446.72x = 186,539,259,469.82
  5. Step 5: Solve for x
    x = 186,539,259,469.82/490,446.72
  6. Step 6: Final answer
    x = 380,345.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.