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Finding the Fourth Proportional to 418,844.31, 628,162.67 and 119,327.49

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Solution

The fourth proportional to 418,844.31, 628,162.67 and 119,327.49 is: 178,961.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,844.31 : 628,162.67 = 119,327.49 : x
  2. Step 2: Convert to fraction form
    418,844.31/628,162.67 = 119,327.49/x
  3. Step 3: Cross multiply
    418,844.31x = 628,162.67 × 119,327.49
  4. Step 4: Simplify right side
    418,844.31x = 74,957,071,581.99
  5. Step 5: Solve for x
    x = 74,957,071,581.99/418,844.31
  6. Step 6: Final answer
    x = 178,961.66

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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.