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Finding the Fourth Proportional to 418,242.05, 627,361.82 and 118,722.88

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Solution

The fourth proportional to 418,242.05, 627,361.82 and 118,722.88 is: 178,083.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,242.05 : 627,361.82 = 118,722.88 : x
  2. Step 2: Convert to fraction form
    418,242.05/627,361.82 = 118,722.88/x
  3. Step 3: Cross multiply
    418,242.05x = 627,361.82 × 118,722.88
  4. Step 4: Simplify right side
    418,242.05x = 74,482,202,072.44
  5. Step 5: Solve for x
    x = 74,482,202,072.44/418,242.05
  6. Step 6: Final answer
    x = 178,083.96

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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.