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Finding the Fourth Proportional to 331,170.40, 496,415.40 and 162,431.20

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Solution

The fourth proportional to 331,170.40, 496,415.40 and 162,431.20 is: 243,479.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,170.40 : 496,415.40 = 162,431.20 : x
  2. Step 2: Convert to fraction form
    331,170.40/496,415.40 = 162,431.20/x
  3. Step 3: Cross multiply
    331,170.40x = 496,415.40 × 162,431.20
  4. Step 4: Simplify right side
    331,170.40x = 80,633,349,120.48
  5. Step 5: Solve for x
    x = 80,633,349,120.48/331,170.40
  6. Step 6: Final answer
    x = 243,479.94

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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.