Home / 420,067.61-579,738.26-256,819.91

Finding the Fourth Proportional to 420,067.61, 579,738.26 and 256,819.91

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Solution

The fourth proportional to 420,067.61, 579,738.26 and 256,819.91 is: 354,438.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,067.61 : 579,738.26 = 256,819.91 : x
  2. Step 2: Convert to fraction form
    420,067.61/579,738.26 = 256,819.91/x
  3. Step 3: Cross multiply
    420,067.61x = 579,738.26 × 256,819.91
  4. Step 4: Simplify right side
    420,067.61x = 148,888,323,573.97
  5. Step 5: Solve for x
    x = 148,888,323,573.97/420,067.61
  6. Step 6: Final answer
    x = 354,438.96

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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.