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Finding the Fourth Proportional to 324,091.20, 486,136.80 and 209,929.80

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Solution

The fourth proportional to 324,091.20, 486,136.80 and 209,929.80 is: 314,894.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,091.20 : 486,136.80 = 209,929.80 : x
  2. Step 2: Convert to fraction form
    324,091.20/486,136.80 = 209,929.80/x
  3. Step 3: Cross multiply
    324,091.20x = 486,136.80 × 209,929.80
  4. Step 4: Simplify right side
    324,091.20x = 102,054,601,196.64
  5. Step 5: Solve for x
    x = 102,054,601,196.64/324,091.20
  6. Step 6: Final answer
    x = 314,894.70

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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.