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Finding the Fourth Proportional to 490,441.36, 676,869.54 and 275,576.75

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Solution

The fourth proportional to 490,441.36, 676,869.54 and 275,576.75 is: 380,329.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,441.36 : 676,869.54 = 275,576.75 : x
  2. Step 2: Convert to fraction form
    490,441.36/676,869.54 = 275,576.75/x
  3. Step 3: Cross multiply
    490,441.36x = 676,869.54 × 275,576.75
  4. Step 4: Simplify right side
    490,441.36x = 186,529,508,007.20
  5. Step 5: Solve for x
    x = 186,529,508,007.20/490,441.36
  6. Step 6: Final answer
    x = 380,329.89

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1.5x scale

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.