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Finding the Fourth Proportional to 439,690.40, 659,583.39 and 140,100.56

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Solution

The fourth proportional to 439,690.40, 659,583.39 and 140,100.56 is: 210,166.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,690.40 : 659,583.39 = 140,100.56 : x
  2. Step 2: Convert to fraction form
    439,690.40/659,583.39 = 140,100.56/x
  3. Step 3: Cross multiply
    439,690.40x = 659,583.39 × 140,100.56
  4. Step 4: Simplify right side
    439,690.40x = 92,407,999,007.78
  5. Step 5: Solve for x
    x = 92,407,999,007.78/439,690.40
  6. Step 6: Final answer
    x = 210,166.06

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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.