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Finding the Fourth Proportional to 324,003.40, 485,786.40 and 172,225.60

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Solution

The fourth proportional to 324,003.40, 485,786.40 and 172,225.60 is: 258,222.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,003.40 : 485,786.40 = 172,225.60 : x
  2. Step 2: Convert to fraction form
    324,003.40/485,786.40 = 172,225.60/x
  3. Step 3: Cross multiply
    324,003.40x = 485,786.40 × 172,225.60
  4. Step 4: Simplify right side
    324,003.40x = 83,664,854,211.84
  5. Step 5: Solve for x
    x = 83,664,854,211.84/324,003.40
  6. Step 6: Final answer
    x = 258,222.15

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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.