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Finding the Fourth Proportional to 399,123.44, 550,801.68 and 217,846.88

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Solution

The fourth proportional to 399,123.44, 550,801.68 and 217,846.88 is: 300,634.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,123.44 : 550,801.68 = 217,846.88 : x
  2. Step 2: Convert to fraction form
    399,123.44/550,801.68 = 217,846.88/x
  3. Step 3: Cross multiply
    399,123.44x = 550,801.68 × 217,846.88
  4. Step 4: Simplify right side
    399,123.44x = 119,990,427,486.76
  5. Step 5: Solve for x
    x = 119,990,427,486.76/399,123.44
  6. Step 6: Final answer
    x = 300,634.88

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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.