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Finding the Fourth Proportional to 311,180.88, 429,439.84 and 190,375.84

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Solution

The fourth proportional to 311,180.88, 429,439.84 and 190,375.84 is: 262,724.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,180.88 : 429,439.84 = 190,375.84 : x
  2. Step 2: Convert to fraction form
    311,180.88/429,439.84 = 190,375.84/x
  3. Step 3: Cross multiply
    311,180.88x = 429,439.84 × 190,375.84
  4. Step 4: Simplify right side
    311,180.88x = 81,754,970,269.47
  5. Step 5: Solve for x
    x = 81,754,970,269.47/311,180.88
  6. Step 6: Final answer
    x = 262,724.92

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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.