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Finding the Fourth Proportional to 718,912.08, 992,101.96 and 396,622

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Solution

The fourth proportional to 718,912.08, 992,101.96 and 396,622 is: 547,340.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,912.08 : 992,101.96 = 396,622 : x
  2. Step 2: Convert to fraction form
    718,912.08/992,101.96 = 396,622/x
  3. Step 3: Cross multiply
    718,912.08x = 992,101.96 × 396,622
  4. Step 4: Simplify right side
    718,912.08x = 393,489,463,579.12
  5. Step 5: Solve for x
    x = 393,489,463,579.12/718,912.08
  6. Step 6: Final answer
    x = 547,340.17

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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.