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Finding the Fourth Proportional to 878,863.56, 1,318,238.83 and 280,253.71

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Solution

The fourth proportional to 878,863.56, 1,318,238.83 and 280,253.71 is: 420,362.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,863.56 : 1,318,238.83 = 280,253.71 : x
  2. Step 2: Convert to fraction form
    878,863.56/1,318,238.83 = 280,253.71/x
  3. Step 3: Cross multiply
    878,863.56x = 1,318,238.83 × 280,253.71
  4. Step 4: Simplify right side
    878,863.56x = 369,441,322,773.56
  5. Step 5: Solve for x
    x = 369,441,322,773.56/878,863.56
  6. Step 6: Final answer
    x = 420,362.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.