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Finding the Fourth Proportional to 312,361.32, 431,032.08 and 183,286.44

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Solution

The fourth proportional to 312,361.32, 431,032.08 and 183,286.44 is: 252,919.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,361.32 : 431,032.08 = 183,286.44 : x
  2. Step 2: Convert to fraction form
    312,361.32/431,032.08 = 183,286.44/x
  3. Step 3: Cross multiply
    312,361.32x = 431,032.08 × 183,286.44
  4. Step 4: Simplify right side
    312,361.32x = 79,002,335,469.00
  5. Step 5: Solve for x
    x = 79,002,335,469.00/312,361.32
  6. Step 6: Final answer
    x = 252,919.71

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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.