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Finding the Fourth Proportional to 521,373.09, 782,355.23 and 281,483.79

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Solution

The fourth proportional to 521,373.09, 782,355.23 and 281,483.79 is: 422,385.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,373.09 : 782,355.23 = 281,483.79 : x
  2. Step 2: Convert to fraction form
    521,373.09/782,355.23 = 281,483.79/x
  3. Step 3: Cross multiply
    521,373.09x = 782,355.23 × 281,483.79
  4. Step 4: Simplify right side
    521,373.09x = 220,220,313,859.30
  5. Step 5: Solve for x
    x = 220,220,313,859.30/521,373.09
  6. Step 6: Final answer
    x = 422,385.27

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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.