Home / 479,190.45-661,495.38-309,507.33

Finding the Fourth Proportional to 479,190.45, 661,495.38 and 309,507.33

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Solution

The fourth proportional to 479,190.45, 661,495.38 and 309,507.33 is: 427,257.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,190.45 : 661,495.38 = 309,507.33 : x
  2. Step 2: Convert to fraction form
    479,190.45/661,495.38 = 309,507.33/x
  3. Step 3: Cross multiply
    479,190.45x = 661,495.38 × 309,507.33
  4. Step 4: Simplify right side
    479,190.45x = 204,737,668,871.14
  5. Step 5: Solve for x
    x = 204,737,668,871.14/479,190.45
  6. Step 6: Final answer
    x = 427,257.41

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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.