Home / 420,211.22-630,321.21-120,691.10

Finding the Fourth Proportional to 420,211.22, 630,321.21 and 120,691.10

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Solution

The fourth proportional to 420,211.22, 630,321.21 and 120,691.10 is: 181,037.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,211.22 : 630,321.21 = 120,691.10 : x
  2. Step 2: Convert to fraction form
    420,211.22/630,321.21 = 120,691.10/x
  3. Step 3: Cross multiply
    420,211.22x = 630,321.21 × 120,691.10
  4. Step 4: Simplify right side
    420,211.22x = 76,074,161,764.03
  5. Step 5: Solve for x
    x = 76,074,161,764.03/420,211.22
  6. Step 6: Final answer
    x = 181,037.91

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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.