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Finding the Fourth Proportional to 440,709.12, 660,961.44 and 215,845.20

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Solution

The fourth proportional to 440,709.12, 660,961.44 and 215,845.20 is: 323,717.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,709.12 : 660,961.44 = 215,845.20 : x
  2. Step 2: Convert to fraction form
    440,709.12/660,961.44 = 215,845.20/x
  3. Step 3: Cross multiply
    440,709.12x = 660,961.44 × 215,845.20
  4. Step 4: Simplify right side
    440,709.12x = 142,665,354,209.09
  5. Step 5: Solve for x
    x = 142,665,354,209.09/440,709.12
  6. Step 6: Final answer
    x = 323,717.73

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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.