Home / 420,100.92-579,789.09-238,840.20

Finding the Fourth Proportional to 420,100.92, 579,789.09 and 238,840.20

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Solution

The fourth proportional to 420,100.92, 579,789.09 and 238,840.20 is: 329,627.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,100.92 : 579,789.09 = 238,840.20 : x
  2. Step 2: Convert to fraction form
    420,100.92/579,789.09 = 238,840.20/x
  3. Step 3: Cross multiply
    420,100.92x = 579,789.09 × 238,840.20
  4. Step 4: Simplify right side
    420,100.92x = 138,476,942,213.42
  5. Step 5: Solve for x
    x = 138,476,942,213.42/420,100.92
  6. Step 6: Final answer
    x = 329,627.80

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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.