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Finding the Fourth Proportional to 483,920.10, 667,617.94 and 279,933.18

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Solution

The fourth proportional to 483,920.10, 667,617.94 and 279,933.18 is: 386,196.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,920.10 : 667,617.94 = 279,933.18 : x
  2. Step 2: Convert to fraction form
    483,920.10/667,617.94 = 279,933.18/x
  3. Step 3: Cross multiply
    483,920.10x = 667,617.94 × 279,933.18
  4. Step 4: Simplify right side
    483,920.10x = 186,888,412,969.25
  5. Step 5: Solve for x
    x = 186,888,412,969.25/483,920.10
  6. Step 6: Final answer
    x = 386,196.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.