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Finding the Fourth Proportional to 490,494.48, 676,900.20 and 275,638.80

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Solution

The fourth proportional to 490,494.48, 676,900.20 and 275,638.80 is: 380,391.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,494.48 : 676,900.20 = 275,638.80 : x
  2. Step 2: Convert to fraction form
    490,494.48/676,900.20 = 275,638.80/x
  3. Step 3: Cross multiply
    490,494.48x = 676,900.20 × 275,638.80
  4. Step 4: Simplify right side
    490,494.48x = 186,579,958,847.76
  5. Step 5: Solve for x
    x = 186,579,958,847.76/490,494.48
  6. Step 6: Final answer
    x = 380,391.56

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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.