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Finding the Fourth Proportional to 489,212.80, 733,819.20 and 355,811.20

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Solution

The fourth proportional to 489,212.80, 733,819.20 and 355,811.20 is: 533,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,212.80 : 733,819.20 = 355,811.20 : x
  2. Step 2: Convert to fraction form
    489,212.80/733,819.20 = 355,811.20/x
  3. Step 3: Cross multiply
    489,212.80x = 733,819.20 × 355,811.20
  4. Step 4: Simplify right side
    489,212.80x = 261,101,090,135.04
  5. Step 5: Solve for x
    x = 261,101,090,135.04/489,212.80
  6. Step 6: Final answer
    x = 533,716.80

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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.