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Finding the Fourth Proportional to 439,608.55, 659,405.67 and 140,085.09

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Solution

The fourth proportional to 439,608.55, 659,405.67 and 140,085.09 is: 210,125.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,608.55 : 659,405.67 = 140,085.09 : x
  2. Step 2: Convert to fraction form
    439,608.55/659,405.67 = 140,085.09/x
  3. Step 3: Cross multiply
    439,608.55x = 659,405.67 × 140,085.09
  4. Step 4: Simplify right side
    439,608.55x = 92,372,902,628.46
  5. Step 5: Solve for x
    x = 92,372,902,628.46/439,608.55
  6. Step 6: Final answer
    x = 210,125.35

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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.