Home / 420,516.20-630,870.89-120,999.26

Finding the Fourth Proportional to 420,516.20, 630,870.89 and 120,999.26

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Solution

The fourth proportional to 420,516.20, 630,870.89 and 120,999.26 is: 181,526.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,516.20 : 630,870.89 = 120,999.26 : x
  2. Step 2: Convert to fraction form
    420,516.20/630,870.89 = 120,999.26/x
  3. Step 3: Cross multiply
    420,516.20x = 630,870.89 × 120,999.26
  4. Step 4: Simplify right side
    420,516.20x = 76,334,910,845.54
  5. Step 5: Solve for x
    x = 76,334,910,845.54/420,516.20
  6. Step 6: Final answer
    x = 181,526.68

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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.