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Finding the Fourth Proportional to 412,081.56, 617,014.94 and 261,506.61

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Solution

The fourth proportional to 412,081.56, 617,014.94 and 261,506.61 is: 391,557.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,081.56 : 617,014.94 = 261,506.61 : x
  2. Step 2: Convert to fraction form
    412,081.56/617,014.94 = 261,506.61/x
  3. Step 3: Cross multiply
    412,081.56x = 617,014.94 × 261,506.61
  4. Step 4: Simplify right side
    412,081.56x = 161,353,483,971.22
  5. Step 5: Solve for x
    x = 161,353,483,971.22/412,081.56
  6. Step 6: Final answer
    x = 391,557.16

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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.