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Finding the Fourth Proportional to 490,516.92, 676,904.31 and 275,653.89

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Solution

The fourth proportional to 490,516.92, 676,904.31 and 275,653.89 is: 380,397.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,516.92 : 676,904.31 = 275,653.89 : x
  2. Step 2: Convert to fraction form
    490,516.92/676,904.31 = 275,653.89/x
  3. Step 3: Cross multiply
    490,516.92x = 676,904.31 × 275,653.89
  4. Step 4: Simplify right side
    490,516.92x = 186,591,306,209.27
  5. Step 5: Solve for x
    x = 186,591,306,209.27/490,516.92
  6. Step 6: Final answer
    x = 380,397.29

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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.