Home / 420,399.26-580,168.40-239,143.12

Finding the Fourth Proportional to 420,399.26, 580,168.40 and 239,143.12

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Solution

The fourth proportional to 420,399.26, 580,168.40 and 239,143.12 is: 330,027.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,399.26 : 580,168.40 = 239,143.12 : x
  2. Step 2: Convert to fraction form
    420,399.26/580,168.40 = 239,143.12/x
  3. Step 3: Cross multiply
    420,399.26x = 580,168.40 × 239,143.12
  4. Step 4: Simplify right side
    420,399.26x = 138,743,281,301.41
  5. Step 5: Solve for x
    x = 138,743,281,301.41/420,399.26
  6. Step 6: Final answer
    x = 330,027.42

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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.