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Finding the Fourth Proportional to 439,605.30, 659,400.75 and 140,081.79

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Solution

The fourth proportional to 439,605.30, 659,400.75 and 140,081.79 is: 210,120.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,605.30 : 659,400.75 = 140,081.79 : x
  2. Step 2: Convert to fraction form
    439,605.30/659,400.75 = 140,081.79/x
  3. Step 3: Cross multiply
    439,605.30x = 659,400.75 × 140,081.79
  4. Step 4: Simplify right side
    439,605.30x = 92,370,037,387.34
  5. Step 5: Solve for x
    x = 92,370,037,387.34/439,605.30
  6. Step 6: Final answer
    x = 210,120.39

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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.