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Finding the Fourth Proportional to 553,769.64, 764,391.96 and 324,400.50

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Solution

The fourth proportional to 553,769.64, 764,391.96 and 324,400.50 is: 447,783.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,769.64 : 764,391.96 = 324,400.50 : x
  2. Step 2: Convert to fraction form
    553,769.64/764,391.96 = 324,400.50/x
  3. Step 3: Cross multiply
    553,769.64x = 764,391.96 × 324,400.50
  4. Step 4: Simplify right side
    553,769.64x = 247,969,134,019.98
  5. Step 5: Solve for x
    x = 247,969,134,019.98/553,769.64
  6. Step 6: Final answer
    x = 447,783.91

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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.