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Finding the Fourth Proportional to 490,391.16, 676,720.96 and 275,540.28

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Solution

The fourth proportional to 490,391.16, 676,720.96 and 275,540.28 is: 380,235.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,391.16 : 676,720.96 = 275,540.28 : x
  2. Step 2: Convert to fraction form
    490,391.16/676,720.96 = 275,540.28/x
  3. Step 3: Cross multiply
    490,391.16x = 676,720.96 × 275,540.28
  4. Step 4: Simplify right side
    490,391.16x = 186,463,882,800.27
  5. Step 5: Solve for x
    x = 186,463,882,800.27/490,391.16
  6. Step 6: Final answer
    x = 380,235.00

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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.