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Finding the Fourth Proportional to 664,980.80, 997,600.80 and 285,900.80

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Solution

The fourth proportional to 664,980.80, 997,600.80 and 285,900.80 is: 428,906.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,980.80 : 997,600.80 = 285,900.80 : x
  2. Step 2: Convert to fraction form
    664,980.80/997,600.80 = 285,900.80/x
  3. Step 3: Cross multiply
    664,980.80x = 997,600.80 × 285,900.80
  4. Step 4: Simplify right side
    664,980.80x = 285,214,866,800.64
  5. Step 5: Solve for x
    x = 285,214,866,800.64/664,980.80
  6. Step 6: Final answer
    x = 428,906.92

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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.