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Finding the Fourth Proportional to 309,847.34, 427,491.86 and 173,861.30

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Solution

The fourth proportional to 309,847.34, 427,491.86 and 173,861.30 is: 239,873.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,847.34 : 427,491.86 = 173,861.30 : x
  2. Step 2: Convert to fraction form
    309,847.34/427,491.86 = 173,861.30/x
  3. Step 3: Cross multiply
    309,847.34x = 427,491.86 × 173,861.30
  4. Step 4: Simplify right side
    309,847.34x = 74,324,290,519.02
  5. Step 5: Solve for x
    x = 74,324,290,519.02/309,847.34
  6. Step 6: Final answer
    x = 239,873.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.