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Finding the Fourth Proportional to 418,211.02, 627,313.79 and 118,691.78

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Solution

The fourth proportional to 418,211.02, 627,313.79 and 118,691.78 is: 178,036.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,211.02 : 627,313.79 = 118,691.78 : x
  2. Step 2: Convert to fraction form
    418,211.02/627,313.79 = 118,691.78/x
  3. Step 3: Cross multiply
    418,211.02x = 627,313.79 × 118,691.78
  4. Step 4: Simplify right side
    418,211.02x = 74,456,992,218.66
  5. Step 5: Solve for x
    x = 74,456,992,218.66/418,211.02
  6. Step 6: Final answer
    x = 178,036.90

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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.