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Finding the Fourth Proportional to 399,232.36, 550,932.42 and 217,947.88

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Solution

The fourth proportional to 399,232.36, 550,932.42 and 217,947.88 is: 300,763.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,232.36 : 550,932.42 = 217,947.88 : x
  2. Step 2: Convert to fraction form
    399,232.36/550,932.42 = 217,947.88/x
  3. Step 3: Cross multiply
    399,232.36x = 550,932.42 × 217,947.88
  4. Step 4: Simplify right side
    399,232.36x = 120,074,552,962.27
  5. Step 5: Solve for x
    x = 120,074,552,962.27/399,232.36
  6. Step 6: Final answer
    x = 300,763.58

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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.