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Finding the Fourth Proportional to 492,876.39, 680,141.10 and 278,003.64

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Solution

The fourth proportional to 492,876.39, 680,141.10 and 278,003.64 is: 383,629.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,876.39 : 680,141.10 = 278,003.64 : x
  2. Step 2: Convert to fraction form
    492,876.39/680,141.10 = 278,003.64/x
  3. Step 3: Cross multiply
    492,876.39x = 680,141.10 × 278,003.64
  4. Step 4: Simplify right side
    492,876.39x = 189,081,701,513.60
  5. Step 5: Solve for x
    x = 189,081,701,513.60/492,876.39
  6. Step 6: Final answer
    x = 383,629.05

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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.