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Finding the Fourth Proportional to 445,411.20, 667,209.60 and 276,412.80

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Solution

The fourth proportional to 445,411.20, 667,209.60 and 276,412.80 is: 414,056.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,411.20 : 667,209.60 = 276,412.80 : x
  2. Step 2: Convert to fraction form
    445,411.20/667,209.60 = 276,412.80/x
  3. Step 3: Cross multiply
    445,411.20x = 667,209.60 × 276,412.80
  4. Step 4: Simplify right side
    445,411.20x = 184,425,273,722.88
  5. Step 5: Solve for x
    x = 184,425,273,722.88/445,411.20
  6. Step 6: Final answer
    x = 414,056.21

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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.