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Finding the Fourth Proportional to 399,218.46, 550,922.58 and 217,930.56

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Solution

The fourth proportional to 399,218.46, 550,922.58 and 217,930.56 is: 300,744.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,218.46 : 550,922.58 = 217,930.56 : x
  2. Step 2: Convert to fraction form
    399,218.46/550,922.58 = 217,930.56/x
  3. Step 3: Cross multiply
    399,218.46x = 550,922.58 × 217,930.56
  4. Step 4: Simplify right side
    399,218.46x = 120,062,866,376.05
  5. Step 5: Solve for x
    x = 120,062,866,376.05/399,218.46
  6. Step 6: Final answer
    x = 300,744.78

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1.5x scale

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.