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Finding the Fourth Proportional to 439,620.80, 658,912.80 and 186,900.80

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Solution

The fourth proportional to 439,620.80, 658,912.80 and 186,900.80 is: 280,130.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,620.80 : 658,912.80 = 186,900.80 : x
  2. Step 2: Convert to fraction form
    439,620.80/658,912.80 = 186,900.80/x
  3. Step 3: Cross multiply
    439,620.80x = 658,912.80 × 186,900.80
  4. Step 4: Simplify right side
    439,620.80x = 123,151,329,450.24
  5. Step 5: Solve for x
    x = 123,151,329,450.24/439,620.80
  6. Step 6: Final answer
    x = 280,130.81

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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.