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Finding the Fourth Proportional to 439,773.40, 659,660.10 and 218,128.60

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Solution

The fourth proportional to 439,773.40, 659,660.10 and 218,128.60 is: 327,192.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,773.40 : 659,660.10 = 218,128.60 : x
  2. Step 2: Convert to fraction form
    439,773.40/659,660.10 = 218,128.60/x
  3. Step 3: Cross multiply
    439,773.40x = 659,660.10 × 218,128.60
  4. Step 4: Simplify right side
    439,773.40x = 143,890,734,088.86
  5. Step 5: Solve for x
    x = 143,890,734,088.86/439,773.40
  6. Step 6: Final answer
    x = 327,192.90

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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.