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Finding the Fourth Proportional to 668,708.80, 922,639.61 and 396,550.42

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Solution

The fourth proportional to 668,708.80, 922,639.61 and 396,550.42 is: 547,133.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,708.80 : 922,639.61 = 396,550.42 : x
  2. Step 2: Convert to fraction form
    668,708.80/922,639.61 = 396,550.42/x
  3. Step 3: Cross multiply
    668,708.80x = 922,639.61 × 396,550.42
  4. Step 4: Simplify right side
    668,708.80x = 365,873,124,854.14
  5. Step 5: Solve for x
    x = 365,873,124,854.14/668,708.80
  6. Step 6: Final answer
    x = 547,133.71

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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.