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Finding the Fourth Proportional to 668,620.45, 922,471.81 and 381,937.56

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Solution

The fourth proportional to 668,620.45, 922,471.81 and 381,937.56 is: 526,945.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,620.45 : 922,471.81 = 381,937.56 : x
  2. Step 2: Convert to fraction form
    668,620.45/922,471.81 = 381,937.56/x
  3. Step 3: Cross multiply
    668,620.45x = 922,471.81 × 381,937.56
  4. Step 4: Simplify right side
    668,620.45x = 352,326,632,280.18
  5. Step 5: Solve for x
    x = 352,326,632,280.18/668,620.45
  6. Step 6: Final answer
    x = 526,945.64

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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.