Home / 420,515.20-630,869.39-120,998.26

Finding the Fourth Proportional to 420,515.20, 630,869.39 and 120,998.26

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Solution

The fourth proportional to 420,515.20, 630,869.39 and 120,998.26 is: 181,525.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,515.20 : 630,869.39 = 120,998.26 : x
  2. Step 2: Convert to fraction form
    420,515.20/630,869.39 = 120,998.26/x
  3. Step 3: Cross multiply
    420,515.20x = 630,869.39 × 120,998.26
  4. Step 4: Simplify right side
    420,515.20x = 76,334,097,202.58
  5. Step 5: Solve for x
    x = 76,334,097,202.58/420,515.20
  6. Step 6: Final answer
    x = 181,525.18

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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.