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Finding the Fourth Proportional to 638,297.40, 957,446.10 and 439,231.80

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Solution

The fourth proportional to 638,297.40, 957,446.10 and 439,231.80 is: 658,847.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,297.40 : 957,446.10 = 439,231.80 : x
  2. Step 2: Convert to fraction form
    638,297.40/957,446.10 = 439,231.80/x
  3. Step 3: Cross multiply
    638,297.40x = 957,446.10 × 439,231.80
  4. Step 4: Simplify right side
    638,297.40x = 420,540,773,905.98
  5. Step 5: Solve for x
    x = 420,540,773,905.98/638,297.40
  6. Step 6: Final answer
    x = 658,847.70

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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.