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Finding the Fourth Proportional to 668,869.92, 922,979.61 and 396,891

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Solution

The fourth proportional to 668,869.92, 922,979.61 and 396,891 is: 547,673.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,869.92 : 922,979.61 = 396,891 : x
  2. Step 2: Convert to fraction form
    668,869.92/922,979.61 = 396,891/x
  3. Step 3: Cross multiply
    668,869.92x = 922,979.61 × 396,891
  4. Step 4: Simplify right side
    668,869.92x = 366,322,300,392.51
  5. Step 5: Solve for x
    x = 366,322,300,392.51/668,869.92
  6. Step 6: Final answer
    x = 547,673.46

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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.