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Finding the Fourth Proportional to 420,188.31, 630,266.06 and 120,667.73

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Solution

The fourth proportional to 420,188.31, 630,266.06 and 120,667.73 is: 180,996.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,188.31 : 630,266.06 = 120,667.73 : x
  2. Step 2: Convert to fraction form
    420,188.31/630,266.06 = 120,667.73/x
  3. Step 3: Cross multiply
    420,188.31x = 630,266.06 × 120,667.73
  4. Step 4: Simplify right side
    420,188.31x = 76,052,771,906.58
  5. Step 5: Solve for x
    x = 76,052,771,906.58/420,188.31
  6. Step 6: Final answer
    x = 180,996.88

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1.5x scale

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.