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Finding the Fourth Proportional to 399,308.19, 550,846.44 and 238,049.61

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Solution

The fourth proportional to 399,308.19, 550,846.44 and 238,049.61 is: 328,389.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,308.19 : 550,846.44 = 238,049.61 : x
  2. Step 2: Convert to fraction form
    399,308.19/550,846.44 = 238,049.61/x
  3. Step 3: Cross multiply
    399,308.19x = 550,846.44 × 238,049.61
  4. Step 4: Simplify right side
    399,308.19x = 131,128,780,211.89
  5. Step 5: Solve for x
    x = 131,128,780,211.89/399,308.19
  6. Step 6: Final answer
    x = 328,389.91

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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.