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Finding the Fourth Proportional to 399,141.12, 550,285.44 and 330,900.48

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Solution

The fourth proportional to 399,141.12, 550,285.44 and 330,900.48 is: 456,203.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,141.12 : 550,285.44 = 330,900.48 : x
  2. Step 2: Convert to fraction form
    399,141.12/550,285.44 = 330,900.48/x
  3. Step 3: Cross multiply
    399,141.12x = 550,285.44 × 330,900.48
  4. Step 4: Simplify right side
    399,141.12x = 182,089,716,233.01
  5. Step 5: Solve for x
    x = 182,089,716,233.01/399,141.12
  6. Step 6: Final answer
    x = 456,203.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.