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Finding the Fourth Proportional to 439,626.60, 659,439.90 and 203,430.60

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Solution

The fourth proportional to 439,626.60, 659,439.90 and 203,430.60 is: 305,145.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,626.60 : 659,439.90 = 203,430.60 : x
  2. Step 2: Convert to fraction form
    439,626.60/659,439.90 = 203,430.60/x
  3. Step 3: Cross multiply
    439,626.60x = 659,439.90 × 203,430.60
  4. Step 4: Simplify right side
    439,626.60x = 134,150,254,520.94
  5. Step 5: Solve for x
    x = 134,150,254,520.94/439,626.60
  6. Step 6: Final answer
    x = 305,145.90

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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.