Home / 420,515.55-630,869.92-120,998.61

Finding the Fourth Proportional to 420,515.55, 630,869.92 and 120,998.61

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Solution

The fourth proportional to 420,515.55, 630,869.92 and 120,998.61 is: 181,525.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,515.55 : 630,869.92 = 120,998.61 : x
  2. Step 2: Convert to fraction form
    420,515.55/630,869.92 = 120,998.61/x
  3. Step 3: Cross multiply
    420,515.55x = 630,869.92 × 120,998.61
  4. Step 4: Simplify right side
    420,515.55x = 76,334,383,108.31
  5. Step 5: Solve for x
    x = 76,334,383,108.31/420,515.55
  6. Step 6: Final answer
    x = 181,525.71

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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.