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Finding the Fourth Proportional to 479,408.69, 661,621.34 and 275,530.75

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Solution

The fourth proportional to 479,408.69, 661,621.34 and 275,530.75 is: 380,253.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,408.69 : 661,621.34 = 275,530.75 : x
  2. Step 2: Convert to fraction form
    479,408.69/661,621.34 = 275,530.75/x
  3. Step 3: Cross multiply
    479,408.69x = 661,621.34 × 275,530.75
  4. Step 4: Simplify right side
    479,408.69x = 182,297,023,060.98
  5. Step 5: Solve for x
    x = 182,297,023,060.98/479,408.69
  6. Step 6: Final answer
    x = 380,253.90

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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.