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Finding the Fourth Proportional to 490,807.65, 677,310.42 and 275,948.58

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Solution

The fourth proportional to 490,807.65, 677,310.42 and 275,948.58 is: 380,806.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,807.65 : 677,310.42 = 275,948.58 : x
  2. Step 2: Convert to fraction form
    490,807.65/677,310.42 = 275,948.58/x
  3. Step 3: Cross multiply
    490,807.65x = 677,310.42 × 275,948.58
  4. Step 4: Simplify right side
    490,807.65x = 186,902,848,618.20
  5. Step 5: Solve for x
    x = 186,902,848,618.20/490,807.65
  6. Step 6: Final answer
    x = 380,806.71

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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.