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Finding the Fourth Proportional to 439,633.68, 658,425.06 and 321,010.80

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Solution

The fourth proportional to 439,633.68, 658,425.06 and 321,010.80 is: 480,767.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,633.68 : 658,425.06 = 321,010.80 : x
  2. Step 2: Convert to fraction form
    439,633.68/658,425.06 = 321,010.80/x
  3. Step 3: Cross multiply
    439,633.68x = 658,425.06 × 321,010.80
  4. Step 4: Simplify right side
    439,633.68x = 211,361,555,250.65
  5. Step 5: Solve for x
    x = 211,361,555,250.65/439,633.68
  6. Step 6: Final answer
    x = 480,767.43

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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.