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Finding the Fourth Proportional to 418,520.30, 627,685.92 and 118,994.36

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Solution

The fourth proportional to 418,520.30, 627,685.92 and 118,994.36 is: 178,464.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,520.30 : 627,685.92 = 118,994.36 : x
  2. Step 2: Convert to fraction form
    418,520.30/627,685.92 = 118,994.36/x
  3. Step 3: Cross multiply
    418,520.30x = 627,685.92 × 118,994.36
  4. Step 4: Simplify right side
    418,520.30x = 74,691,084,331.41
  5. Step 5: Solve for x
    x = 74,691,084,331.41/418,520.30
  6. Step 6: Final answer
    x = 178,464.66

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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.