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Finding the Fourth Proportional to 275,379.77, 380,023.20 and 154,521.61

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Solution

The fourth proportional to 275,379.77, 380,023.20 and 154,521.61 is: 213,239.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,379.77 : 380,023.20 = 154,521.61 : x
  2. Step 2: Convert to fraction form
    275,379.77/380,023.20 = 154,521.61/x
  3. Step 3: Cross multiply
    275,379.77x = 380,023.20 × 154,521.61
  4. Step 4: Simplify right side
    275,379.77x = 58,721,795,751.29
  5. Step 5: Solve for x
    x = 58,721,795,751.29/275,379.77
  6. Step 6: Final answer
    x = 213,239.32

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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.