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Finding the Fourth Proportional to 291,454.20, 404,040.96 and 275,489.10

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Solution

The fourth proportional to 291,454.20, 404,040.96 and 275,489.10 is: 381,908.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,454.20 : 404,040.96 = 275,489.10 : x
  2. Step 2: Convert to fraction form
    291,454.20/404,040.96 = 275,489.10/x
  3. Step 3: Cross multiply
    291,454.20x = 404,040.96 × 275,489.10
  4. Step 4: Simplify right side
    291,454.20x = 111,308,880,433.54
  5. Step 5: Solve for x
    x = 111,308,880,433.54/291,454.20
  6. Step 6: Final answer
    x = 381,908.65

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.