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Finding the Fourth Proportional to 311,464.80, 429,855.04 and 190,687.36

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Solution

The fourth proportional to 311,464.80, 429,855.04 and 190,687.36 is: 263,169.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,464.80 : 429,855.04 = 190,687.36 : x
  2. Step 2: Convert to fraction form
    311,464.80/429,855.04 = 190,687.36/x
  3. Step 3: Cross multiply
    311,464.80x = 429,855.04 × 190,687.36
  4. Step 4: Simplify right side
    311,464.80x = 81,967,922,760.29
  5. Step 5: Solve for x
    x = 81,967,922,760.29/311,464.80
  6. Step 6: Final answer
    x = 263,169.14

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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.