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Finding the Fourth Proportional to 386,995.21, 580,269.31 and 150,061.09

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Solution

The fourth proportional to 386,995.21, 580,269.31 and 150,061.09 is: 225,004.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,995.21 : 580,269.31 = 150,061.09 : x
  2. Step 2: Convert to fraction form
    386,995.21/580,269.31 = 150,061.09/x
  3. Step 3: Cross multiply
    386,995.21x = 580,269.31 × 150,061.09
  4. Step 4: Simplify right side
    386,995.21x = 87,075,845,152.15
  5. Step 5: Solve for x
    x = 87,075,845,152.15/386,995.21
  6. Step 6: Final answer
    x = 225,004.97

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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.