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Finding the Fourth Proportional to 311,694.88, 429,939.48 and 216,166.72

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Solution

The fourth proportional to 311,694.88, 429,939.48 and 216,166.72 is: 298,171.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,694.88 : 429,939.48 = 216,166.72 : x
  2. Step 2: Convert to fraction form
    311,694.88/429,939.48 = 216,166.72/x
  3. Step 3: Cross multiply
    311,694.88x = 429,939.48 × 216,166.72
  4. Step 4: Simplify right side
    311,694.88x = 92,938,607,190.11
  5. Step 5: Solve for x
    x = 92,938,607,190.11/311,694.88
  6. Step 6: Final answer
    x = 298,171.75

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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.