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Finding the Fourth Proportional to 976,720.80, 1,463,914.80 and 408,100.80

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Solution

The fourth proportional to 976,720.80, 1,463,914.80 and 408,100.80 is: 611,663.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    976,720.80 : 1,463,914.80 = 408,100.80 : x
  2. Step 2: Convert to fraction form
    976,720.80/1,463,914.80 = 408,100.80/x
  3. Step 3: Cross multiply
    976,720.80x = 1,463,914.80 × 408,100.80
  4. Step 4: Simplify right side
    976,720.80x = 597,424,801,011.84
  5. Step 5: Solve for x
    x = 597,424,801,011.84/976,720.80
  6. Step 6: Final answer
    x = 611,663.85

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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.