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Finding the Fourth Proportional to 311,150.88, 429,396.90 and 190,290

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Solution

The fourth proportional to 311,150.88, 429,396.90 and 190,290 is: 262,605.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,150.88 : 429,396.90 = 190,290 : x
  2. Step 2: Convert to fraction form
    311,150.88/429,396.90 = 190,290/x
  3. Step 3: Cross multiply
    311,150.88x = 429,396.90 × 190,290
  4. Step 4: Simplify right side
    311,150.88x = 81,709,936,101
  5. Step 5: Solve for x
    x = 81,709,936,101/311,150.88
  6. Step 6: Final answer
    x = 262,605.51

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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.