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Finding the Fourth Proportional to 387,072.65, 580,609.06 and 120,855.98

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Solution

The fourth proportional to 387,072.65, 580,609.06 and 120,855.98 is: 181,284.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,072.65 : 580,609.06 = 120,855.98 : x
  2. Step 2: Convert to fraction form
    387,072.65/580,609.06 = 120,855.98/x
  3. Step 3: Cross multiply
    387,072.65x = 580,609.06 × 120,855.98
  4. Step 4: Simplify right side
    387,072.65x = 70,170,078,092.56
  5. Step 5: Solve for x
    x = 70,170,078,092.56/387,072.65
  6. Step 6: Final answer
    x = 181,284.00

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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.