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Finding the Fourth Proportional to 418,519.30, 627,684.42 and 118,993.36

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Solution

The fourth proportional to 418,519.30, 627,684.42 and 118,993.36 is: 178,463.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,519.30 : 627,684.42 = 118,993.36 : x
  2. Step 2: Convert to fraction form
    418,519.30/627,684.42 = 118,993.36/x
  3. Step 3: Cross multiply
    418,519.30x = 627,684.42 × 118,993.36
  4. Step 4: Simplify right side
    418,519.30x = 74,690,278,155.45
  5. Step 5: Solve for x
    x = 74,690,278,155.45/418,519.30
  6. Step 6: Final answer
    x = 178,463.16

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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.