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Finding the Fourth Proportional to 455,334.38, 628,361.61 and 251,385.47

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Solution

The fourth proportional to 455,334.38, 628,361.61 and 251,385.47 is: 346,912.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,334.38 : 628,361.61 = 251,385.47 : x
  2. Step 2: Convert to fraction form
    455,334.38/628,361.61 = 251,385.47/x
  3. Step 3: Cross multiply
    455,334.38x = 628,361.61 × 251,385.47
  4. Step 4: Simplify right side
    455,334.38x = 157,960,978,659.81
  5. Step 5: Solve for x
    x = 157,960,978,659.81/455,334.38
  6. Step 6: Final answer
    x = 346,912.04

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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.