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Finding the Fourth Proportional to 520,879.80, 782,990.10 and 483,900.60

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Solution

The fourth proportional to 520,879.80, 782,990.10 and 483,900.60 is: 727,402.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,879.80 : 782,990.10 = 483,900.60 : x
  2. Step 2: Convert to fraction form
    520,879.80/782,990.10 = 483,900.60/x
  3. Step 3: Cross multiply
    520,879.80x = 782,990.10 × 483,900.60
  4. Step 4: Simplify right side
    520,879.80x = 378,889,379,184.06
  5. Step 5: Solve for x
    x = 378,889,379,184.06/520,879.80
  6. Step 6: Final answer
    x = 727,402.71

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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.