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Finding the Fourth Proportional to 665,003.80, 997,635.30 and 285,923.80

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Solution

The fourth proportional to 665,003.80, 997,635.30 and 285,923.80 is: 428,941.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,003.80 : 997,635.30 = 285,923.80 : x
  2. Step 2: Convert to fraction form
    665,003.80/997,635.30 = 285,923.80/x
  3. Step 3: Cross multiply
    665,003.80x = 997,635.30 × 285,923.80
  4. Step 4: Simplify right side
    665,003.80x = 285,247,675,990.14
  5. Step 5: Solve for x
    x = 285,247,675,990.14/665,003.80
  6. Step 6: Final answer
    x = 428,941.42

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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.