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Finding the Fourth Proportional to 258,620.30, 356,890.42 and 149,729.23

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Solution

The fourth proportional to 258,620.30, 356,890.42 and 149,729.23 is: 206,623.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,620.30 : 356,890.42 = 149,729.23 : x
  2. Step 2: Convert to fraction form
    258,620.30/356,890.42 = 149,729.23/x
  3. Step 3: Cross multiply
    258,620.30x = 356,890.42 × 149,729.23
  4. Step 4: Simplify right side
    258,620.30x = 53,436,927,780.98
  5. Step 5: Solve for x
    x = 53,436,927,780.98/258,620.30
  6. Step 6: Final answer
    x = 206,623.10

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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.