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Finding the Fourth Proportional to 386,774.63, 580,162.13 and 120,556.61

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Solution

The fourth proportional to 386,774.63, 580,162.13 and 120,556.61 is: 180,834.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,774.63 : 580,162.13 = 120,556.61 : x
  2. Step 2: Convert to fraction form
    386,774.63/580,162.13 = 120,556.61/x
  3. Step 3: Cross multiply
    386,774.63x = 580,162.13 × 120,556.61
  4. Step 4: Simplify right side
    386,774.63x = 69,942,379,643.18
  5. Step 5: Solve for x
    x = 69,942,379,643.18/386,774.63
  6. Step 6: Final answer
    x = 180,834.97

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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.