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Finding the Fourth Proportional to 331,627.80, 496,383.30 and 261,643.80

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Solution

The fourth proportional to 331,627.80, 496,383.30 and 261,643.80 is: 391,630.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,627.80 : 496,383.30 = 261,643.80 : x
  2. Step 2: Convert to fraction form
    331,627.80/496,383.30 = 261,643.80/x
  3. Step 3: Cross multiply
    331,627.80x = 496,383.30 × 261,643.80
  4. Step 4: Simplify right side
    331,627.80x = 129,875,612,868.54
  5. Step 5: Solve for x
    x = 129,875,612,868.54/331,627.80
  6. Step 6: Final answer
    x = 391,630.66

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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.