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Finding the Fourth Proportional to 668,877.92, 922,990.62 and 396,899

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Solution

The fourth proportional to 668,877.92, 922,990.62 and 396,899 is: 547,684.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,877.92 : 922,990.62 = 396,899 : x
  2. Step 2: Convert to fraction form
    668,877.92/922,990.62 = 396,899/x
  3. Step 3: Cross multiply
    668,877.92x = 922,990.62 × 396,899
  4. Step 4: Simplify right side
    668,877.92x = 366,334,054,087.38
  5. Step 5: Solve for x
    x = 366,334,054,087.38/668,877.92
  6. Step 6: Final answer
    x = 547,684.48

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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.