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Finding the Fourth Proportional to 308,379.65, 425,695.07 and 187,559.75

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Solution

The fourth proportional to 308,379.65, 425,695.07 and 187,559.75 is: 258,912.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,379.65 : 425,695.07 = 187,559.75 : x
  2. Step 2: Convert to fraction form
    308,379.65/425,695.07 = 187,559.75/x
  3. Step 3: Cross multiply
    308,379.65x = 425,695.07 × 187,559.75
  4. Step 4: Simplify right side
    308,379.65x = 79,843,262,438.57
  5. Step 5: Solve for x
    x = 79,843,262,438.57/308,379.65
  6. Step 6: Final answer
    x = 258,912.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.