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Finding the Fourth Proportional to 321,208.79, 481,649.13 and 118,794.65

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Solution

The fourth proportional to 321,208.79, 481,649.13 and 118,794.65 is: 178,131.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,208.79 : 481,649.13 = 118,794.65 : x
  2. Step 2: Convert to fraction form
    321,208.79/481,649.13 = 118,794.65/x
  3. Step 3: Cross multiply
    321,208.79x = 481,649.13 × 118,794.65
  4. Step 4: Simplify right side
    321,208.79x = 57,217,339,821.15
  5. Step 5: Solve for x
    x = 57,217,339,821.15/321,208.79
  6. Step 6: Final answer
    x = 178,131.30

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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.