Home / 579,126.46-868,992.60-420,512.61

Finding the Fourth Proportional to 579,126.46, 868,992.60 and 420,512.61

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Solution

The fourth proportional to 579,126.46, 868,992.60 and 420,512.61 is: 630,988.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,126.46 : 868,992.60 = 420,512.61 : x
  2. Step 2: Convert to fraction form
    579,126.46/868,992.60 = 420,512.61/x
  3. Step 3: Cross multiply
    579,126.46x = 868,992.60 × 420,512.61
  4. Step 4: Simplify right side
    579,126.46x = 365,422,344,194.12
  5. Step 5: Solve for x
    x = 365,422,344,194.12/579,126.46
  6. Step 6: Final answer
    x = 630,988.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.