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Finding the Fourth Proportional to 418,236.88, 627,261.20 and 118,711.12

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Solution

The fourth proportional to 418,236.88, 627,261.20 and 118,711.12 is: 178,039.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,236.88 : 627,261.20 = 118,711.12 : x
  2. Step 2: Convert to fraction form
    418,236.88/627,261.20 = 118,711.12/x
  3. Step 3: Cross multiply
    418,236.88x = 627,261.20 × 118,711.12
  4. Step 4: Simplify right side
    418,236.88x = 74,462,879,584.54
  5. Step 5: Solve for x
    x = 74,462,879,584.54/418,236.88
  6. Step 6: Final answer
    x = 178,039.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.