Home / 420,400.26-580,169.78-239,144.12

Finding the Fourth Proportional to 420,400.26, 580,169.78 and 239,144.12

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Solution

The fourth proportional to 420,400.26, 580,169.78 and 239,144.12 is: 330,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,400.26 : 580,169.78 = 239,144.12 : x
  2. Step 2: Convert to fraction form
    420,400.26/580,169.78 = 239,144.12/x
  3. Step 3: Cross multiply
    420,400.26x = 580,169.78 × 239,144.12
  4. Step 4: Simplify right side
    420,400.26x = 138,744,191,488.69
  5. Step 5: Solve for x
    x = 138,744,191,488.69/420,400.26
  6. Step 6: Final answer
    x = 330,028.80

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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.