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Finding the Fourth Proportional to 664,805.80, 996,560.70 and 380,204.20

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Solution

The fourth proportional to 664,805.80, 996,560.70 and 380,204.20 is: 569,935.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,805.80 : 996,560.70 = 380,204.20 : x
  2. Step 2: Convert to fraction form
    664,805.80/996,560.70 = 380,204.20/x
  3. Step 3: Cross multiply
    664,805.80x = 996,560.70 × 380,204.20
  4. Step 4: Simplify right side
    664,805.80x = 378,896,563,694.94
  5. Step 5: Solve for x
    x = 378,896,563,694.94/664,805.80
  6. Step 6: Final answer
    x = 569,935.71

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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.