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Finding the Fourth Proportional to 439,602.30, 659,396.25 and 140,078.79

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Solution

The fourth proportional to 439,602.30, 659,396.25 and 140,078.79 is: 210,115.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,602.30 : 659,396.25 = 140,078.79 : x
  2. Step 2: Convert to fraction form
    439,602.30/659,396.25 = 140,078.79/x
  3. Step 3: Cross multiply
    439,602.30x = 659,396.25 × 140,078.79
  4. Step 4: Simplify right side
    439,602.30x = 92,367,428,830.54
  5. Step 5: Solve for x
    x = 92,367,428,830.54/439,602.30
  6. Step 6: Final answer
    x = 210,115.89

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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.